I don't cover my pool in the winter, nor do I drain it. This winter, for the first time, the water level has reached the top of the liner. I am assuming that because the level is right at the top of the liner, that it has already overflowed behind the pool wall some. Is this a serious enough problem that I should drain or can I just let nature run its course? (My only means is to siphen since I have the skimmer closed off and empty for the winter and I don't own a portable pump.)