If you leave the rollers on the press up on the inking plate when you’re not using it, it may have created a flat spot, which would explain why it only prints sometimes. I leave my rollers on the press, but I make sure I take out the chase and make sure the rollers aren’t sitting on the plate. We were having some problems when we first got our press, so we sent our rollers in to be recovered and it turned out that the trucks were too big for the rollers. So the company fixed it for us. My husband had them recovered so I’m not sure the name of the company, I think it was in Cleveland.