I am currently sleeping on memory foam over latex. Prior to this I was only using latex, which was very hot. The memory foam does not seem quite as hot but I still wake up many nights searching for a cool spot. I never have heat issues with innerspring mattresses, but hesitate to buy one with a pillowtop because they tend not to last long. If I use some kind of mattress topper over the innerspring, do you think I will continue to have the same heat issues? Any suggestions on how to improve the heat issue?