Nice, wonder how it will work with the switch all greased up. Going to use that next time I have to clean a switch, thanks. Night work even better using an ultrasonic cleaner with the small plastic tub sittting in the water in it, faster and scrubs all the dirt off as well. With the Bakelite remember to use some hot air ( 130c or so) for a while to dry it if the switch is used to switch HT, as the SRBP will have absorbed a lot of water, and will arc over.