I've not had to do anything other than light cleaning. When I moved a few years ago all of my keyboards were in the same box. Apparently it got really hot bec

I've not had to do anything other than light cleaning. When I moved a few years ago all of my keyboards were in the same box. Apparently it got really hot because a smaller (TKL) style Lexmark era IBM keyboard in that box melted, but my 2 Model Ms were fine. These things are built like tanks. I don't think I'll ever have to do any repairs on them.