This is the 2nd year in a row I've had a Spring leak in the pond. I've let the water level go down and it appears to point to the skimmer again. Last year I just tightened all the screws at the face plate (it's a Savio skimmer). I tried that this year but it still leaks. If I take the face off is there any kind of sealer I can use? Also, is the best, easiest way to clean out the winter leaves & muck just to drain it and hose it out? Thanks!