Once warmer is cool, you can use warm water and soap to wash the heating plate of your Baby’s Brew Portable Bottle Warmer. Be sure that you do not fully submerge the warmer in water and make sure the warmer charging port is unplugged and the cover is closed. You can sanitize it by putting equal parts of distilled vinegar and water in a bottle and setting the temperature to 110 and letting it sit for 20-30 minutes. On the go you can use breast pump cleaning wipes to wipe off the heating plate between uses.