I have a 20+ y/o Whirlpool SxS and no matter what I do every 6-8 months the screw in the slide on fridge door handle gets loose. I've simply tightened it early on but for the last few years I tucked a tooth pick in to tighten up the screw. Well it happened again, looking for a better solution. It's always the top screw and I have reversed the handle in the past. Ideas?