When gunk builds up inside the drain, it could cause the bathtub drain stopper to become stuck in the open or closed position. You must remove the stopper to . 15 Mar 2013 – Some things that may cause your bathtub drain stopper to get stuck could be that there is hair clogging the drain, or some other type of . 1 Nov 2018 – Learn how to easily identify and fix problems with your bathtub drain stopper. Avoid paying expensive service fees to call out a plumber! Follow . Had new bathroom fitted and the knob that opens the bath plug has …