How to tighten Moen bath faucet loose handles?
Hand unscrew the base of the handles which is the part which rest on the tub. Once this is undone, the handle part comes off of the white plastic nut and if you look inside the handle you will see a phillips head screw. Tighten the screw with a screwdriver and then place back on the on oversized white plastic nut. Then carefully reseat the base of the faucet back on the plastic threads and hand tighten.
