I have two of the Rockler wooden shop stools and that have a swivel seat and three legs. They are ok stools, but they have an annoying habit of wanting to not slide. No I know that no one wants a slippery stool, but I am talking about the times I just want to nudge it with my leg and have it slide to the side when my hands are full of other things. It wants to readily tip and the leg just sticks in the one spot to the cement floor. I believe the metal tabs (smooth) on the bottom of the legs is nickel or something similar. There is nothing on the leg taps that is sticky. I am always picking these stools up off the floor. Can't readily think of anything I could do that would not make them generally unsafe. Any thoughts out there?