Here are some ways to clean aluminium cookie sheets:
Penaik soda
Sprinkle baking soda on the cookie sheet and spray with hydrogen peroxide until the baking soda is wet. Let it sit overnight if possible. Baking soda is gentle and won't scratch or discolor the finish. You can also make a paste of baking soda and water and use a soft-bristle brush to clean stains.
Penaik soda, cuka, and garam
Borax dan hangat air
Borax can remove stains, sticky grime, and burnt food.
Krim of tartar dan cuka
Mix cream of tartar with white vinegar and soak the cookie sheet for about eight hours.
Dryer sheet
Put a dryer sheet in the bottom of the pan with some dish soap and boiling water. Let it sit for 30–60 minutes. The dryer sheet can help break down grease and stains.
You can also soak the cookie sheet in soapy water and then clean with a non-abrasive sponge. When you're done, bilas thoroughly with warm water.