Had the same problem as a teenager/young adult. A US doctor provided a prescription form me that worked. It involved application and then applying plastic wrap and leaving it on all night. It burned and itched like crazy but it worked. At first the effects only lasted a couple of months but after several applications the problem was gone.
Can't remember the name of the prescription so I don't know if it's still available.
But I can really relate to your comments about all the issues the sweatiness caused. I had forgotten that I used to have to buy only clothes that wouldn't show the wetness!
I hope your product continutes to work for you.