I need to replace the wheels/casters and cannot get ANY movement. What's the trick? I have them soaking in WD, it's low 30's here so I'm trying to shake off some cabin fever. I also need to replace some bolts that hold the steps to the side rails. I had one step that was missing both top side bolts and when trying to remove an orig bolt it snapped. So now I'm soaking everything in WD. The bolts are stainless and drilling them out is gonna suck or be impossible.