I agree with the WD-40, I had typed a reply to you yesterday but forgot to post it. The switches can very often be saved by taking them apart and cleaning off the contacts. They trap lots of lint and gunk over time. Open them up, blow them out and clean off the contacts and I'd bet 99% of the time they will go right back to working. You could also try an air blow with out even taking them out on the chance the lint is not all gummed up with oil, etc. and will just blow out. As mentioned, stuff breaks over time.