Had need to replace my 40 year old pool light burned out. All pool companies will not do it. My problem was getting the screw out so I could remove the light. Looked utube and finally got it. Had my doubts but used a small length phillips screw driver and a hammer to gently hammer the screw to break it free. It worked. New light new gasket and all is ok. Did not have to drain the pool. DIY and have patience and it will work breaking free.