Hi there. I've got the exact same problem. This seems to be common since an internet search on the topic turned up a lot of hits. Anyway, here is the best tip I've found. I haven't tried it yet but it looks correct.
http://www.applianceaid.com/otr-door.html
Rodney, January 2007
I asked a very similiar question to repair support at www.repairclinic.com and within 20 minutes I had a detailed answer back to me.
