The reason why the oven smokes may be that the cleaning is not thorough enough after the last use, or the food is burnt because of the high temperature setting. Suggestion: Before the oven is officially used, it should be baked at high temperature to discharge the heating smell of the new oven. Wipe the inside and outside of the oven with a clean damp cloth before use. After the oven door is half open, the upper and lower fires are fully opened, and the temperature is adjusted to the highest temperature (250℃), 10 minute.