i acutally used foam weather stripping to insulate the area around the lid and to cover 3/4 of the lid it makes a really tight seal around the tank. i still have to mist the tank 2 times daily but it drops at a less rate.also you could get a bigger water bowl and move it to the hot side of the tank.another thing im trying is the silk fake leaves by misting them too. its about 20 degrees in va right now and if i mist up to 65 percent at 7 30 am its about 45 percent when i get home from work at 6 30