Yeah..things (rings, keys, etc.) can get stuck on the threads and loosen them. I think the only way you can have it totally fixed is to have the handles replaced completely. However, you can take a tiny pair of mustache or other tiny scissors and trim a couple millimeters of the thread off, then put a bit of this stuff called Fray Check (available at Target or material stores) on the end of the thread to keep it from fraying. The stitching is really tight so trimming a tiny bit of it off won't make the stitches unravel or anything.