Use a spatula or scraper to remove large pieces of food from the pan.
Prepare the soak:
Fill a baking sheet with hot water and add a generous amount of dishwashing liquid.
Leave to soak:
Leave the pan to soak for at least an hour, preferably overnight if the dirt is very hard-core.
Rub:
Put on rubber gloves and clean the pan with a scourer or steel wool. Use a stiff brush for tough spots if necessary.
Rinse and dry:
Rinse the baking sheet with hot water and dry it with a soft cloth.
Method 3: Baking soda and a plastic bag