Hi there Mystical, I also struggle with sweaty hands. I'd say my experience with Firm Grip is pretty similar to what what Polarpole is describing. It's SUPER sticky initially and is perfect for those tricky inverted hand holds (think Ayesha). It's so sticky that it's actually tricky to readjust, like you just put your hands on flypaper. After my hands warm up, though, it's almost like it starts to melt, and then it ends up getting a bit slick. I found myself having to combine it with dry hands. It's rosin based, so it makes sense that temperature thins it out.
Another good one to try is itac. You can use it on yourself or on the pole, and a little goes a long way. I've just starting dabbling with that one, so can't really give a full review, but I can definitely say that there's no such thing as too many grip aids.