Nick and I are living in an old farm house and we had a mouse problem for a while... we seem to have gotten rid of the mice (thankfully!) but we had two couches in the back room that we had not gotten around to setting up... so during the mouse problem we weren't ever in that room, which made it a nice place for the mice to hang out. Well, now we're in the middle of getting the rest of the house set up and livable... and those couches have mouse poop on them. Not a lot, mind you... but enough that I'm grossed out. Whats the best way to clean the stuff up and make things actually sanitary?