Grohe master bath tub faucet leaks at the diverter
We have a Grohe faucet in the master bath tub. There is a knob you pull on the faucet to redirect the water to the hand sprayer. All of sudden, now the water leaks out around the knob when it is is the "down" position (water supposed to go to faucet). If you pull it up, sending the water to the hand sprayer, it stops leaking. I opened the access door to the tub motor and confirmed that no water is leaking from the bottom of the faucet. Have you ever seen this before? Is there something I can adjust, I did try to tighten the knob, but that had no effect.