Elizabethann D Newbury , NH July 26, 2016 Plastic end cap had yellowed over time (in a non smoking house!!) Replaced end cap. Special start screwdriver needed but had it, so the job took about five minutes - start to finish. Read More... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Screwdrivers