The lever to raise and lower my Rockshox Reverb Stealth 31.6 dropper post comes loose occasionally and can swing around 360 degrees. My seat is then stuck until I tight up the screw. When I re-tighten the screw, the lever works again and the dropper post works fine. However, I don't want to do this on the trail obviously. Does anyone know how I can prevent this problem from reoccurring?