This appliance is super-handy — but it can't handle everything . Getty Dry Sponges If you like to zap the bacteria that lingers on your kitchen sponge in the microwave, you need to make sure the sponge saturated with water first. Here's why: Microwaves are attracted to water. "They work by making water or fat molecules move and heat by friction," explains Sharon Franke, director of the Kitchen Appliances and Technology Lab at the Good Housekeeping Institute. "If sponges are dry, there's no water to attract energy and the sponges themselves will attract energy and can catch on fire." Getty Food Containers With Metal Stop before you heat up last night's Chinese food leftovers if the containers have metal handles, to be specific. You see, metal is more solid than food, so as the microwave heats up, molecules in the material start to vibrate, but don't have anywhere to go — which could start a fire. Just move your rice and veggies to a plate to av...
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