I think a quick wipe with a wet cloth would do it for me in most circumstances.
The good rule of progression from "clean" foods (like bread, cooked veg) to "semi-clean" (cooked meats) to "semi-filthy" (raw veg with earth on the skin) to "filthy" (raw meat) to "unclean" (offal) should be followed in the kitchen at home, as well as out in the field.
I suspect that many bacteria won't live and multiply in great numbers outside of the range of temperatures normal in the host body.
For really cleaning, even sterilizing, I'd go for carrying a small bottle of 90° alcohol. You can use this to sterilize a wound, clean a knife, or light a fire. Very useful stuff.
K.