Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.
When you cleaned it did you check inside the valve body? If there is neoprene residue from the old cartridge left behind in the valve then that can cause a leak
If there's no residue inside the valve and a plumber installed a new cartridge then the valve is probably defective. Most Moen valves have a lifetime warranty against manufacturing defects. I'd contact Moen directly and insist on a replacement. You can call them at 1-***-***-****.
A phone call is just an option. We an continue here if you have more questions
I'm sorry but you can't fix a defective valve. You don't have to "tear the place apart" to to replace the valve. I hate to be the bearer of bad news but I didn't make your valve.
I'm not a magician. You can't fix a valve with a defect. I'll let customer service know you want a refund.