If you have found that heat mats create more males, why are you using one? I do not know if cc gear is shit or not, but I will not ever use a heat mat again (unless I need it, like it being winter and I am in a cold garage or some out of the ordinary shit). Like someone else posted, if your conditions are right you don't need mat. So, take it a step further. If your conditions are right and you then use a heat mat, then your conditions are no longer right. It's too hot. It's fucking July 25, you need a slight chill mat if anything.
Mine weren't cheap. I bought a few of them, the fucking themostat bullshit that costs more than the mats. Jumpstart frame and small light, all that bullshit. It is sitting on a shelf. Throw them fuckers in root riot cubes. Don't let the cubes dry out.