Poor Cooking Performance in Air Fryer: What 97,574 Reviews Reveal
Poor Cooking Performance: The “Hidden Killer” of the Air Fryer Industry
Many consumers expect air fryers to make crispy-outside-juicy-inside french fries, fragrant and non-greasy roasted chicken wings, and honey-oozing baked sweet potatoes without oil. But after purchasing one, they find the gap between ideal and reality is shockingly wide: food is either burnt on the outside and raw inside, still undercooked after half an hour of roasting, or limp with no crispness at all. Our analysis of 97,574 real user reviews covering 4,937 products found that 27% of negative air fryer reviews are directly related to poor cooking performance, a proportion far higher than common pain points like “hard to clean” and “loud noise”. This is the core reason many users regret their purchase immediately after buying.
Ms. Lin, a post-1995 consumer living in a coastal city, is a typical victim. She bought a sleek-looking air fryer priced under 200 yuan during last year’s major e-commerce promotion. The first two attempts at making frozen french fries had passable results, but the problem emerged when she tried to roast a whole chicken: she set it to 180℃ for 40 minutes as instructed in the manual, but when she took it out, the breast was overcooked and dry, while the drumstick was still bloody when bitten into. When she contacted customer service for feedback, she was told it was “improper operation and required flipping halfway”. But even after flipping 3 times as required, parts of the chicken were burnt while others were undercooked. The fryer was eventually left unused in the corner of her balcony, which works out to a usage cost of over 30 yuan per use.
Why Is Cooking Performance Poor? An In-depth Breakdown of the Root Causes
We analyzed the issue from three dimensions: material science, manufacturing process, and usage habits, and found that the vast majority of poor cooking performance issues are not caused by users “not knowing how to use them”, but by design or quality defects of the product itself:
Manufacturing Process Defects: Jerry-building of Core Components is the Hardest Hit Area
- Unreasonable hot air circulation duct design: The core of an air fryer is the directional circulation of hot air in a sealed cavity, just like an air conditioner with air deflectors at home can make the temperature of the whole room uniform, while an air conditioner without air deflectors can only cool the area directly blown by it. Many low-priced products have no guide duct design at all, only an air outlet on the top, so hot air can only blow to the upper layer of food, and the lower layer is completely not covered by hot air. As mentioned in user negative reviews: “If you put multiple layers of grills together, only the food on the top layer can be cooked”, which eventually leads to serious uneven heating.
- Falsified power rating + poor heating tube material: Many products are marked with a high power of 1800W, but the actual rated heating power is only 1200W. The heating tube is made of low-quality nickel-plated thin iron sheet instead of the higher-cost 304 stainless steel heating tube. The actual heating efficiency is only 60% of that of qualified products, and the temperature rises extremely slowly, leading to the problem of “still not cooked even after twice the cooking time marked in the manual”. Some users even reported that “the machine operates normally but the food is still frozen”, which means the heating tube has failed.
- Poor temperature sensor accuracy: Qualified air fryers use dual NTC temperature sensors, with a temperature control error within ±5℃. However, many low-priced products only use ordinary thermistors costing a few cents, with a temperature control error of up to ±20℃, which is equivalent to using an inaccurate thermometer that shows 36℃ when you actually have a fever of 40℃. The final result is that the surface of the food has been burnt by high temperature, but the internal temperature has not reached the threshold for being cooked, which is the common “burnt outside and raw inside” problem encountered by users.
- Insufficient fan speed: The crispness of air-fried food comes from the high-speed hot air taking away the moisture on the food surface. The fan speed of qualified products must reach more than 2000 rpm, so that the hot air has enough penetrating power. The fan speed of many low-priced products is only 1000 rpm, so the hot air can only touch the surface of the food and cannot penetrate thicker ingredients at all. The resulting food is limp like it was baked in an ordinary oven, with no crispness at all.
- Confusing air fryer and oven functions: The core of air frying is the directional circulation of high-speed hot air in a small space, while the core of an oven is the radiant heating of the heating tube, and the design logic of the two is completely different. Many merchants, in order to create the selling point of “multi-purpose machine”, launch 2-in-1 air fryer oven products. In order to adapt to the large space of the oven, they deliberately reduce the fan speed and enlarge the cavity volume, which eventually leads to the greatly weakened air frying performance, completely failing to achieve the crisping effect.
Material Science Level: Low-quality Materials Lower the Performance Ceiling
Many low-priced products use galvanized sheet for the inner cavity, which is easy to oxidize and rust at high temperatures. The heating efficiency will gradually decrease with the increase of use time, and it will also release a pungent plastic odor. Some fryer baskets use low-quality non-stick coatings, which will fall off after 8-10 uses. Residues attached to the cavity and fryer basket will cause local uneven heating, directly affecting the cooking effect. As mentioned in user negative reviews: “After the coating falls off, I have to scrub it for a long time every time, and the food is also easy to burn”.
Usage Habit Level: Wrong Operation Amplifies Product Defects
Even for qualified products, wrong usage habits can lead to poor cooking performance: for example, if the food is piled up exceeding 2/3 of the fryer basket capacity, the hot air cannot circulate at all; never cleaning the oil stains on the heating tube and fan will lead to reduced heating efficiency and air output; completely copying the time and temperature in the manual without adjusting the parameters according to the size and thickness of the ingredients will lead to uneven doneness and insufficient crispness.
Comparison of “Poor Cooking Performance” Performance of Different Materials
The inner cavity and fryer basket material of the air fryer directly affect the heating uniformity and heating efficiency, and the performance of different materials is very different:
| Material Type | Core Advantages | Limitations | Cooking Performance |
|---|---|---|---|
| Galvanized sheet inner cavity | Low cost, light weight | Poor high temperature resistance, easy to oxidize and rust, may precipitate harmful substances at high temperature | Uneven heating, heating efficiency drops significantly after 1-3 months of use, prone to odor and half-cooked food |
| Cold rolled steel plate with low-quality coating | Low cost, good initial non-stick effect | Poor coating wear resistance, easy to fall off, poor high temperature resistance | After the coating falls off, the attached residue leads to local uneven heating, food is easy to burn, cleaning is difficult, and cooking performance declines rapidly with long-term use |
| Cold rolled steel plate with high-quality food-grade coating | Even heating, good non-stick effect, easy to clean | High cost, cannot be scraped with sharp objects | Smooth hot air circulation, uniform temperature conduction, good consistency of food crispness and doneness, stable performance for long-term use (models with “good cooking performance” in positive reviews generally use this material) |
| 304 stainless steel inner cavity/fryer basket | High temperature resistance, corrosion resistance, no risk of coating falling off | High cost, prone to chaotic hot air reflection without air guide pattern design, easy to stick to food | Uniform heating under qualified design, strong durability, prone to local burning if there is no air guide structure |
| Ceramic coated inner cavity | Healthy and safe, strong high temperature resistance, even heating | Poor impact resistance, fragile, high cost | Stable temperature conduction, good consistency of food doneness, high crispness, but easy to crack after bumping which affects use |
How to Avoid Poor Cooking Performance? Purchase and Usage Guide
Core Reference Indicators for Purchase
- Air duct design: Prioritize products marked with “360° circulation guide air duct” and “upper and lower air deflectors”. If the product detail page does not mention the air duct structure at all, it is probably a low-priced, low-equipped model without a guide design, which is very prone to uneven heating.
- Power parameters: Do not only look at the marked total power, check the “rated heating power” clearly. For a 5L capacity model, the rated heating power should reach more than 1400W to be qualified. At the same time, confirm that it has 3C certification to avoid buying products with falsified power ratings.
- Temperature control system: Prioritize products marked with “dual NTC temperature sensors”, with a temperature control error within ±5℃. Do not choose mechanical models without clearly marked temperature control accuracy, which are very prone to the problem of burnt outside and raw inside.
- Fan parameters: Prioritize products marked with a fan speed of more than 2000 rpm. If only “large air volume” is marked without specific speed parameters, it is probably a low-equipped model with insufficient speed, and the food made will hardly have crispness.
- Function positioning: If your main demand is air frying, do not choose the compromised “2-in-1 air fryer oven” model, prioritize a dedicated air fryer model to avoid sacrificing the core air frying performance for the infrequently used oven function.
Process Details Worth Paying Extra For
- Fryer basket with high-density air guide holes: A fryer basket with an aperture of about 3mm and more than 100 holes can not only leak residue but also not block the hot air circulation, leading to more even heating;
- Inner cavity with reflective air guide pattern: It can make the hot air reflect evenly in the cavity and avoid local overheating;
- Non-stick coating that meets national food contact material safety standards: It will not fall off after long-term use and will not affect the heating efficiency.
Correct Usage and Maintenance Methods
- Preheat for 3-5 minutes before each use to make the temperature in the cavity uniform, avoiding the problem of prolonged cooking time and non-crispy food caused by insufficient initial temperature;
- The food filling amount should not exceed 2/3 of the fryer basket capacity. Flip large ingredients halfway through, and exchange the positions of the grills if roasting in multiple layers;
- Clean the fryer basket and inner cavity with a soft sponge after each use when cooled down, and clean the oil stains on the heating tube and fan with a soft brush every 1-2 months to avoid oil stains affecting heating and air output efficiency;
- Do not completely copy the time and temperature in the manual. For thick-cut ingredients, reduce the temperature by 5℃ and extend the time by 3-5 minutes compared with thin-cut ingredients, and adjust the parameters according to your own model.
Common Misconceptions Correction
- Higher power is not always better: The power should match the cavity capacity. 1500W is enough for 5L capacity. Excessive power will instead lead to local overheating and burning;
- Larger capacity is not always better: If you only roast a small amount of food each time, an oversized cavity will instead make the hot air circulation space too large, the temperature rises slowly, the cooking time becomes longer and the food is not crispy;
- Do not believe the propaganda of “no need to flip at all”: Unless it is a special structure with automatic flipping, ordinary models need to be flipped halfway to ensure uniform heating on the top and bottom.
“Pit Avoidance” Lessons from Real Users
We selected the most representative user pitfall cases from tens of thousands of negative reviews to help you avoid common minefields:
User Case 1: “It broke after 7 days of use. There was strange noise at the early stage but it could still work normally. On the seventh night, it turned on and operated normally, but the food put in was still frozen and not heated at all. Finally, I returned it and added 5 yuan to buy another one.” Lesson Summary: Do not choose overly cheap models for the sake of a price difference of tens of yuan. Such products often cut corners on core components such as heating tubes and temperature control elements, which are prone to heating failure. The quality of core components is far more important than short-term price discounts.
User Case 2: “Very disappointing. The capacity is too small. If you put multiple layers of grills, only the food on the top layer can be cooked. It is okay for single use, but completely unsuitable for family use. What a waste of money.” Lesson Summary: Do not blindly believe the propaganda of “multi-layer simultaneous roasting”. Without a special guide duct design, multi-layer roasting will only cause the problem of uneven heating up and down. Before purchasing, confirm whether the product has a special duct design adapted to multi-layer roasting to avoid being misled by false propaganda.
User Case 3: “After using it many times and cleaning it many times, there is still a burnt plastic smell. The food can never be cooked thoroughly. The outside is burnt before the inside is cooked. The small air fryer I used before never did this.” Lesson Summary: If there is still an obvious pungent odor after empty burning the new machine more than 3 times, it is probably that the inner cavity uses low-quality galvanized sheet or unqualified coating, which will not only lead to uneven heating and burnt outside and raw inside, but also have food safety risks. It is recommended to return or exchange it directly.
User Case 4: “The cooking effect is actually very good, but there is a problem with the fryer basket fitting. Every time I have to shake it for a long time or push it hard to put it in. It seems to be a batch quality problem.” Lesson Summary: In addition to core performance, assembly accuracy will also affect the user experience. Too large or too small a gap between the fryer basket and the cavity will affect the hot air circulation. Before purchasing, you can first check the reviews for feedback related to “difficult to insert the fryer basket” and “large gap” to avoid buying batches with unqualified assembly.
User Case 5: “It is not non-stick at all. I have to scrub it for a long time after each use. After 8-10 uses, the black coating has started to fall off. Although the cooking taste is okay, cleaning is too troublesome.” Lesson Summary: Low-quality non-stick coatings will not only fall off during use and contaminate food, but the falling residues and stuck oil stains will also affect the heating uniformity in the cavity, gradually reducing the cooking performance with long-term use. When purchasing, confirm that the coating meets the national food contact material safety standards.
Related Deep Analysis in This Category
- Difficult to Clean — 21% of complaints relate to this
- Non-Stick Coating Peeling — 36% of complaints relate to this
- Short Lifespan & Easy Malfunction — 42% of complaints relate to this
- Structure & Design Defects — 19% of complaints relate to this
