How do I clean the inside of the door window of my self-cleaning oven?

umm. there will always be some assemblence of grease on the door glass, if its on the inner most panel and you can scrub it off, then i would reccomned using a razor blade lying flat to scrape it off, however if it has developed within the panel(s) of glass then the only remedy is to dissassmeble the door and glean them that way.. there was some conflict as to the age of your machine in your description, you say "3-hour cycle for the first use late last spring, if I remember correctly--whatever the directions said to do for the first time, a 4-hour cycle after Thanksgiving last fall and a 3-hour cycle for the second cleaning a couple of days ago since it wasn't very dirty"" so i cant be a mont old??? reason i say is that is the unit you purchased probably come with a pretty kickin warr and the manufacture will want ot make good on your issue if you cant resolve it, betterchance though if only 1 month not 11