How to clean and disinfect your thermometer — and how often you should do it

It's important to disinfect a thermometer before and after every use to reduce the risk of spreading illness. Here's how to ...
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John Wheeler: The mercury in a thermometer is more often alcohol

FARGO — The principal of a liquid-in-glass thermometer is that the liquid inside a very narrow tube will contract and expand with temperature variation. The top of the liquid represents the ...