What do dealers use to deep clean machines? I've seen canned air sitting on work table when I drop off machine....canned air is used by techs who clean and repair the highly sophisticated equipment now used in surgeries..costing way more than our sewing machines... I use it on my new and old,cheap and expensive machines...just let it air out for a few minutes before putting back together.....and use a light hand, not long shots! Just to bring that hidden lint to where you can grab with tweezers or brush or whatever....just what I do, to each is own. Oh, I also have a long nozzle that attaches to can to get into the deep parts..got from friend who was a medical tech....