I always bring multiple sets and follow the instructions on the microwave bag. Sterilizing frequency would depend on my travel schedule and whether I feel the need to sterilize sooner than I normally would because the device has been in my purse for the day. Also, I would try to make sure there was enough time for the device components to dry before needing to pack up and move on. I have found that when I travel I have to relax my standards because traveling throws off my daily practices. But, I love exploring so I try not to focus on the challenges.