Does anyone have any tips on sealing skimmer cover to keep rain water from getting in the skimmer box? We've had an unusual amount of rain so far this winter but I have kept the pool drained and the level has not gotten to the skiller opening. I also have a cover on the opening (skimmer plug) and a gizmo installed for freezing. The only water I'm getting into the skimmer box is coming in from the cover. Any ideas appreciated!!