Spirits of ammonia is hard to come by in certain places that no longer sell it over the counter.
If you are in an area where this is so, then try the next best alternative, called "Sea Breeze", that you can get anywhere, including Wal-Mart.
It is an astringent, that has the same effect (accelerates evaporation). Works extremely well with a Frog-Togg (chiily pad), by squirting some into the ice water. Same application, wipe down arms, face and neck. Really nice.
