I picked up one of these at the end of last year in good condition, but it has one problem. The tools on one side of the handle are very loose, and when you turn it upside down, they just open by themselves and dangle. I can tighten the pivot with a pair of needle nose pliers, but they always loosen after a few times when any of the tools are opened and closed. Is there a way to fix this? Any help would be appreciated!