A greasy oven is a risky thing.
Cooking inside a greasy oven presents severe Fire hazards. It’s a known fact that lots of domestic fires start inside the oven!
Furthermore, the food is not as well cooked as it should be as hot air might not circulate equally inside the oven when the oven walls are not smooth and the greasy fan is unbalanced and works slowly.
Therefore, always keep your oven clean and well-