When you close an above ground pool for the season you are supposed to use a blow up pillow in the center to keep the water from pooling in the center. You should be able to do the same, these pillows are pretty large and you could air it up to the size you need to make the top bubble up in the center and all your water should roll off. You may need more than one but it would stay under your cover so it can't fall off or over or anything like that. I have never done this before but it should work.