I have had my 18' above ground pool for 4 years. Every winter I have drained water below skimmer, put in pillow and put cover on with cable and ratchet...and every year I've been stressed out because of the huge ice ring that forms around the pillow and appears to be pulling on the walls of the pool. I've recently heard of an Enviro-Mesh cover that allows the water to drain through into the pool as it melts. Has anyone ever used one? If using one, do you use a skimmer cover and return plug and not drop the water? Do you drop the water level to allow for melting snow and ice? Do you use a pillow or no pillow?