I cleaned my 401 with a vacuum. I stuck a nylon knee hose on the end and turned my vacuum on. Sucked a couple little screws and they all stopped at the hose.. I bought a pack of disposable mascara brushes and those work like a charm. If you have any old ones you don't use just wash them really good. The chenille wires work well also. I was fortunate the gal who previously owned my 401 took really good care of it. I saw a photo couple weeks ago of the lady who owned it. She has since passed and they did an album in her legacy obituary. Showed her sitting at "our"401" making drapes. That was the caption under the photo. Her husband got it for her one Christmas. I am fortunate and blessed!