PuraSleep 10" CoolFlow Mattress - Twin

So I’ve had this mattress for a couple of months now, and am mostly happy with it.
I am a little warm in it and have had a few nights in which I’ve woken up sweating in it. The other day I lifted the mattress to do some cleaning and realized that the sweat had sunk through and pooled at the bottom of the mattress. The mattress is on a wooden frame with a built in dresser below it, so the mattress lays on large wooden planks. Any thoughts on how to deal with this pooling and how I can possibly clean the mattress? Thank you!