I can strongly recommend Wonder Wipes for cleaning just about anything. They're absolutely amazing - they don't hurt your hands, but can do anything from removing hardened glue from windows (I de-tinted a car earlier this year) to cleaning up your engine to cleaning your hands after a day's work. I guarantee you'll be blown away by them. One word of caution though, don't clean anything with printed writing (such as the front of a cooker) as the ink comes off!
These are the cheapest I can find on Ebay at the moment: