The temperature inside the stove drops and the food becomes too oily, making cleaning more difficult.

1. The temperature inside the stove drops: Excessive oil will absorb the heat inside the stove, causing the temperature of the stove to drop and affecting the baking effect.

2. Food is too oily: If too much oil is applied, the surface of the food will be covered with too much oil, which will cause the food to be too greasy and affect the taste.

3. Increase the difficulty of cleaning: Excessive oil will increase the difficulty of cleaning the stove and make it difficult to keep the stove clean.