Antiseeze would be correct, be sure you are trying to knock it off in the correct direction easily confussed. Also if they haven't been off in a while be persistant and make sure you take them loose at least once a year or more, less problems. Also you don't need to beat the h#&l out of them to be tight enough! I used a 2x4 to beat on while my son put a pry bar against one or the other bars of the spinner and kept movint to different wings on the spinner, then don't over tighten!