I am trying to remove the handles off a eljer shower set. There is a handle for hot, cold and the shower engagement. There is a screw in the middle of the handle. When removed the handle will still not come off. This set is 30+ years old. I have looked for a small hole where I might need to insert something to disengage the handle but there does not seem to be one. BTW - instruct gently - I'm a girl !