Good question! I usually wash my tongs/ spatula/ tray/ sharpened stick everytime I go inside for something. It's a habit I've gotten into that makes me feel a lot cleaner and safer.
Weber Smokey Joe
18" Weber Kettle
22" Weber clone kettle
Curb-foundling char-broil gasser
WSM: Assembled! First cook: 8/25/06
Fanatical devotion to the Q