My bike has a set of Hayes Nine hydraulic discs, and my last set of pads went away quickly after an epic I rode in October. By the end of the ride they were howling like the horn on a locomotive, and cleaning the discs with brakeclean did no good.
I'm going to swap the pads out, and I've noticed that there are quite a few different options. I do fast singletrack with the occasional stream crossing, and I'm trying to pick the best pad. What does everyone else use?