I had such a problem with these Ashlyn shower head the faucets inside are all plastic.   I had to have the plumber back three times and one still is leaking.  The handle was hard to install and adjust to get hot and cold water.  I am thinking of removing them with new ones that work without worrying about the regulation of hot and cold.  It will just switch to either or without touching it.  I have purchased so much from wayfair and have always been happy.  This shower set is awful.   Also the drain is dome shape so not all the water goes down the drain.  I have to wipe it dry.  I want to give it no stars but the last one I cannot remove.  It just does not deserve any stars.  Sorry.  It seems like a very inferior product.