Hubby asked me to raise the temp on the hot tub yesterday cuz he likes it really hot. We hadn't used it for a couple weeks. So I lifted the lid, stuck my hand in to the temp. button and noticed ants on my hand. Then I looked up and the whole inside of the cover was covered in ants! Trillions of them. It was so gross. There were tons dead in the water too. Needless to say we had to empty it out & start all over. Anyone have any ideas for preventing this from happening again, other than checking it every day?