Hi, I have just recently purchased a house and I am pretty raw when it comes to home maintainence but am learning fast. Last night my shower started dripping pretty bad and I am assumiong that I need to replace the washer in the tap which I know how to do. My question is (and please excuse may lack of knowledge on terminology), With the tap covers that go from the wall to cover the inside of the taps, do they generally screw on or are they normally glued on?. The reason why I ask is that it feels pretty tight. I dont know what brand fittings they are but I'm assuming that it's on the cheaper side. Any help would be much appreciated.