Welcome Mike. Electrical switches should never be lubed Mike. They need to stay clean and dry. I`m surprised you didn't create a dead short by doing that. If the router has been sitting unused for a long time the bearing grease may have hardened which may cause premature bearing failure. Bearings are reasonably cheap and easy to come by but when they fail they stop turning as freely and cause the motor to labor which can burn it out and the router is a paperweight at that point so stay aware of that. If it sounds like the motor is starting to labor when it shouldn't be stop and replace the bearings.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.