I have used the plastic 8 position rotary Electroswitch for many years. Most of them last 5 years or more. Currently, however, I am having problems with many of these switches. They are stiff when new, and become increasingly more stiff - hard to turn- necessitating changing them within 3 or 4 weeks. I called Electroswitch, and also Kleenrite asking for any reports of this phenomenon, but they say "No". Has anyone had this issue and/or have a solution? I am totally puzzled.