Grimy Oven Racks..

Cooked-on grime are really stubborn and won't be cleaned easily. Get them off your oven racks by laying them out on an old towel in a large laundry tub. Your bathtub is also an option but you may need to clean it afterwards. Fill the laundry tub or bathtub with warm water and add 1/2 cup of ammonia. Let the racks soak for at least 15 minutes, then remove, rinse off and wipe clean. The grime should be less 'stubborn' now and you should be able to wipe them off easily =) . [Please be extra careful when you are using ammonia]