Katie: "And most colds are transferred from handshakes so wash your with Purel…" Jon: "Okay I'll do that…when I'm not doing the show anymore. I don't have Purel here." Katie: "You should. Al Roker and Matt Lauer are addicted to Purel. I always say you guys would jump in a vat of Purel if you could." Jon: You're not supposed to drink it."

Katie Couric tells Jon Stewart he should was his hands because she has a cold.