<HTML>I use a "zapper." The schematic for this device was listed in the PTG Journal about 30 years ago. It is a home made electrical device, consisting of a transformer, 2 pointed hack saw blades and a buzzer. You wire it up, and plug it in, and touch the points of the blades to each side of the center pin, and it heats the center, which in turn shrinks the bushing and eases it. I have been using it for years, and it has never failed to work. Most lubricants are at best just a temporary fix, especially in humid conditions. I suggest that anyone interested should check the PTG archives for the blueprint for this device. Any questions, contact me, Roy Czekay</HTML>