The shower in our master bathroom had a tendency to drip if it is not turned off just right. It is maddening and incredibly wasteful. I was planning on replacing the valve, but I discovered you can change the "cartridge" inside the valve, so I decided to try that. Since I'm a romantic, I gave Chrissy the new cartridge for her birthday. I finally got around to installing it this past weekend.
As usual, it had to be difficult. The cartridge didn't want to pull out like the instructions claim it will, so I did the same thing I did in the guest bathroom and hit it with some vinegar to dissolve the mineral deposits. I took the opportunity to clean off the tile while the plate was off.