I have found this helpful hint in the notebooks of a policeman from 1859 – PC 207 Lewis Jones from Gorseinon. Perhaps it works, perhaps it doesn’t, though probably if you use enough of it you will stop worry about whether they are sweaty or not.
One ounce of salts desolved in a pint of boyling water, then add the quantity of gin for to make it pleasant to drink, then drink a wine glass full when required.
Let me know if it works