You have probably noticed your Kindle is quite a conversation starter when you have it out and about with you. People want to touch it, and of course you, the proud owner will want to show it off.
You also know hands can be a heck of a way to share not so nice things. It wouldn't hurt to wipe down your Kindle when you return home from your outing.
I keep a small spritzer bottle filled with alcohol close to my computer. Spritz a little on a dry lint-free cloth, then use it to wipe down your Kindle. It works like a charm and won't damage the surface or keys. This is also great to wipe down your keyboard whenever you turn your computer off, and even works good as a quick wipe down for your monitor.