How do I remove the bathtub drain stopper?
Are you talking about a stopper or the actual drain grate? It sounds like you have a stopper that you turn to get it to plug the drain, then lift and turn to let the water drain. If you have one of those, the stopper has to be closed (i.e. able to hold water) to remove it. Once it’s closed, take some pliers and turn it counter-clockwise – like you would remove a screw. But don’t pull up on it until it’s screwed out all the way. If that’s not what you have, then I just wasted your time. Sorry.