um, keep reading the label
omg, I so do that! But then I'll end up deciding that for one reason or another, it didn't work -- either the knife will fall into the sink, or I'll splash dish water on it or something -- and I'll end up either washing it or using a different one anyway. Of course, whenever I *don't* make the 2nd sandwich (or cut up the second fruit or whatever), the knife always stays clean long enough I could have