Yeah, this one's common. It's almost always food debris or oil burning on the heating element or crisper plate. If you see black smoke, that's an immediate stop.
FIX:
- If the unit emits black smoke, unplug it immediately from the wall.
- Wait for all smoking to stop completely.
- Let the unit cool down fully before removing the baskets and crisper plates.
- Wash the baskets and crisper plates in hot, soapy water. They are dishwasher-safe. Wipe the main unit's interior with a soft, damp cloth. Never immerse the main unit in water.
IF THAT DIDN'T WORK: You might be overfilling the basket. Do not overfill, as spilled food can contact the heating elements and burn. Also, ensure the air intake vent and air outlet on the back are not blocked by anything.
HEADS UP: Prevent this by cleaning the baskets and crisper plates regularly and shaking food during cooking for even crisping. Never cover the air vents while operating.