I have a 3-way shower arm diverter for a hand held shower. Its probably 10+ years old and recently started leaking. The drip is cold compared to the hot shower. The work around is to fill the hand held hose with hot water during the shower. One solution is to replace the diverter. But, before I do that I want to explore fixing the existing one. I see that there is a clip on one outlet. Is there something (diaphram, seat, etc.) that I can clean or replace?