We have a 12'x30" above ground intex pool, and it's COLD. We have a solar cover that we keep on it all the time, but the kids still don't want to use it unless it's over 90* outside. We live in MN so those days don't happen often. I'm at my wits end with trying to get them to use it, I'm sick of maintaining it and no one using it. Pretty sure they'd be more likely to use it if the water was warmer. Any ideas?