Use the Aloe vera ones, they are really good at keeping the nasties away I mean they are used for nappy rash, also OLDBMW is correct in saying about using urine to flash out an infection as it contains trace amounts of amonia.
I used to be a jobbing jeweler (lost casting) way back when I was a young lad, and I had to pee on my hands to make them hard so that the heat didn't kill my fingers.
It's also a good way to stay off frostbite for a while if you have no other way of warming a body part up, just make sure that after you pee on whatever, you them put the affected part next to your body for core heating.
Pee is your friend.
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