When you go see your gynecologist for your yearly inspection, you will see the perfect cleaning tool for a machine. The doctor uses a little brush that looks like a mascara brush on a 6 inch stem. Ask the doctor for a few of them (unused, of course!). My doctor llaughed and gave me several that I shared with sewing friends. These long handled little brushes are great!
Some of the cosmetics counters have similar brushes, but without the long stems. The sales ladies sometimes share those with customers.