pour c ammonia into a large ziploc bag and place one stove drip pan into the bag. Seal and place outside overnight (so the fumes don't escape into your house). The next all you have to do is rinse an dry them off and your drip pans are good as new!
How to clean burner pans - Mix 4 tsp vinegar with 4 tsp cream of tartar in small bowl. Dip cotton ball in cleaning solution and rub over entire burner pan. Let sit minutes, then use scouring pad to scrub loosened residue free.
No Scrub Method for cleaning stove burner grates: Seal in a plastic bag with a little ammonia (doesn't need to cover grates). Let sit overnight and the ammonia fumes will break down burnt on grease, etc. Next day, wipe clean with sponge.