A lot of people have mentioned using compressed air to clean out their sewing machines. I use that on my longarm all the time, since the way the longarm is built the air blows any lint off into the room (where I guess I'm supposed to vacuum it up sometime - hah!) However, if you use compressed air on your DSM, make sure that the lint is really being blown out of the machine, and not further into the innards. Usually we are warned against using compressed air in a DSM for that reason.