I fully agree Spartan 2 and also haven't worried much about bacteria in my camping dish cloths; and probably still will not worry about it.  The main thing is not to put your scrubbie away wet.  If I have a damp cloth I often use a wooden clothes pin to clip it to my kayak deck bungee or a pack strap, out of the way but still securely with me.  I also do this with wet shoes or my damp beach towel while I travel.  On a nice day they quickly dry and can be packed away at the next portage.