Place an oven-safe bowl of water mixed with a few tablespoons of vinegar inside the ... For heavy duty cleaning of stubborn stains, consider a steam cleaner, they work wonders.
Fill an oven-safe dish with water and a bit of vinegar or lemon juice, then place it in the oven at 250 F for about 30 minutes. The steam will loosen the gunk, making it easier to wipe away. A damp ...