I have finally worn through a couple of keys on one of my KN7000's. There is a rough area on the keys that is distracting when I play. A careful look at the keys shows small indentations rather than a worn area completely through the plastic. I have given thought to opening the KN7000 and switching locations of key octaves which is probably what I will need to do in the future. But there is also the possibility that the area could be repaired temporarily with something like clear fingernail polish.

Before I attempt any repair, I thought I would ask if any of you have done any similar repair on KN7000 keys and if you could offer any ideas you have used.

I think I will begin to ask my students to wash their hands before using the keyboards. I know that body acids can hasten key wear.