Baking Soda Method
Pour 1/2 cup of baking soda and 1-1/2 cups of water into a small container. Stir well with a spoon to form a paste.
Dip a sponge in the paste and coat the inside of the stainless steel drip pans. Allow the paste to remain on the pans for 10 minutes. Wipe the paste away with a soft cloth.
Fill a sink basin or dish pan with warm water. Add 1/4 cup vinegar and agitate with your hand to mix.
Rinse the drip pans in the vinegar water and dry with a soft cloth before replacing on the stovetop.
Plug a sink basin and pour 1/2 inch of ammonia in the bottom. Put on rubber gloves to protect your skin.
Place 4 soft cloths in the sink to saturate them with ammonia. Remove the cloths one at a time and squeeze lightly to remove excess liquid.
Lay one cloth in each of the stainless steel drip pans. Ensure that the ammonia-soaked cloth is making contact with all inside surfaces of the pan.
Place the pans in a garbage bag and seal the bag tightly. Place the bag in a garage or outside area overnight.
Remove the cloths from the pans. Wash the pans in warm soapy water with a clear water rinse. Dry with a soft cloth and replace them on the stove top.