Thank you for all the replies. Much appreciated. I've been using the plastic switch but am going to start using the metal switch referred to in the discussions, and will be using suggestions found here. My problem is with the plastic switch, which I've used for years, -- not a lubrication or corrosion issue. When they are new and are rotated into a new position, they do so with a much more forceful SNAP than the previous plastic switches that I have used. It seems that the spring that Electro is using is stronger than in previous switches and is causing the detent balls to dig into the plastic track - just a guess - and as a result, our switches have been failing (very difficult to turn) in 4 or 5 weeks. I've contacted Electro and will be forwarding some of these failed switches to them to get a determination of cause. I have a few metal switches on hand and will start using those -- using the lubrication suggestions made. Once I get a reply from Electro, I will post it. Thank you all for your input.