I hate cleaning my stove - all of that built on grease takes a lot of Comet and elbow grease to come clean. So - I thought I'd share a cleaning shortcut that I just learned.
First, put on rubber gloves. Now, take your stove grates and drip pans and place them in a doubled large trash bag. Now, add about 1/3 to 1/2 cup ammonia ($1.12 in Walmart's cleaning department). Close the bag securely, and let it sit overnight. (You may want to put it outside somewhere, in case some of the ammonia manages to leak out.).
In the morning, dump out the ammonia and trash the bags. Now, wipe off the grease. It really is almost that easy - I added a little elbow grease and got a bit more off. There's still a little build up on the grates, in places where it was really deep. I'm sure that another round with the ammonia would take it off, too, but I'll wait until next time. For now, they're cleaner than they've been in a very long time.