I am a first-time Aquador user. (I had to replace the liner on my AG this summer, and the installer changed me over to Aquador face plate. Upon closing, though, it seemed fine until I noticed there was some standing water in the skimmer. I loosened the winter cover and made sure the Aquador was on tight. It was. Could it be condensation? Or are these Aquadors just not watertight? What can be done? Is that bit of leaking water going to freeze and crack the skimmer this winter? Anyone else had this problem?