Try a little WD40 (2 or 3 drops) applied to the screw heads a let sit for an hour. Once you get them off they shouldn't need to be screwed in tight, they don't, after all, hold the machine together. If the screws appear worn you can get replacements.
Originally Posted by Candace
Penni, I noticed the screws at the feed dog plate are a bear to get in and out!! And you have to get the plated seated just so or it will make some noise. I got it worked out, but I'm not looking forward to cleaning this area regularly. I worry about stripping the screws??