Second the recommendation to use Super Clean, I still find it at WalMart without problem. I used to use oven cleaner, but swapped it for Super Clean, much easier to use, not nearly as caustic in terms of vapors or contact to your skin as the lye in oven cleaner, and the bitchin' part is that you can fill a container and use the same batch of SC over and over. I also added SC to my battery of cleaning media, along with mineral spirits, isopropyl and lacquer thinner.
Hope that helps, prosit!
Brad