I have a 15x25 above ground pool that i just covered with an arctic armor mesh pool cover. Its not the leaf net, it is a winter cover that allows the water to drain through. Heres the problem, when we put the cover on, it laid on the water. We drained the pool about 1/2 way. Now when it rains the water just sits on the cover. We tried draining the pool a little more, but the cover just sags a little more and stays on top of the water. What should I do?