Thanks so much to BeeNana and Aurora. I took the bottom off of the machine and there was a felt lining that stinks like crazy. It also felt a little moist. I have taken it out, left off the bottom and airing everything out for tonight in the garage. Hopefully, this will do it. I just need to find out where to order another felt bottom. Do any of you know a good store to order vintage parts from. I'll have to confess that I got into an Ebay frenzy and won three 301 machines in the last week. I didn't think I was bidding high enough to win all three but I did. I got two beige ones and one cream and beige one. Didn't get a manual with any of them but am going to buy one. I'm going to order the DVD about cleaning featherweights and 301s and do it myself. (I also bought a featherweight on Ebay in February - Billy is cleaning it now.) I need to stay away from Ebay (but it sure was fun).