I searched for this but could not find the answer so here goes. I am about to inspect the pads on my front disc brakes and likely replace them. I have read in a lot of places that when I push the pistons back in to make room for the new (thicker) pads, the brake fluid may leak from the resevoir. What is not said is whether or not I am to remove the top of the resevoir before doing this work. It seems that I should but I'd like to know for sure.