If you have used the tub shower combination, it will take 35 minutes for the drip to stop.
If it's still dripping an hour later, "THEN" you have a bad cartridge.
I recently tiled the tub surround in the bathroom, and replaced the old Moen fixture. The valve itself seemed fine so I just purchased a kit to replace the old one.
Long story short... the water has been off in this bathroom for over a year. I have the new kit installed, and the water is on. The problem is there is always a constant drip regardless how much I push the knob back in.
How can I determine if the valve is bad? Is it possible to fix this drip?
Some of the after market repair kits are junk...Moen will send you one for free if you call them. You might need that. As noted, residual water in the shower arm can continue to drip for quite awhile, which doesn't indicate a bad cartridge.
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014
Anyway, problem solved! Thanks again!