First, take a clean cloth run under hot water, and wipe off your steam wands. Remove any milk that has been scorched onto the wand. (Do not scrape the wand with anything sharp. It is stainless steel, and it will scratch.) If the tip of the wand is threaded on and will unscrew, take it off and clean it. Make sure that the end of the wand is free and clear. If needed, use the end of an opened paper clip to scrape out the inside of the tip. Put the tips back onto the steam wands.