BABY WIPES!!!!! Or "COTTONELLE" wipes,(for big kids like us)
One thing about these is they come in their own carrying case, you pull one out (usually takes two for two strokes) and close the top back up. And you can carry them right in your field box.
Plus when it's time to leave the field, you grab one for your hands, and face. (you don't want to do that with ammonia)
I use these most of the time and once in a while I'll grab a squirt bottle of detergent and water and give them a thorough cleaning.
Oh,Yea! Since I have a 20 month young grandson, They're in every vehicle I drive.
DESERT RATT