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Reviews around heat (3.44 of 5)
Coffee Mug Warmer - KRGMNHR 18Watt Auto Shut Off Cup Warmer for Home Office Desk Use, Electric Beverage Warmer Heating Plate for Cocoa,Tea, Water, Milk, Rose Gold
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Here's why: the heater surface is made of glass, and glass is a very poor heat conductor.
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Worked just fine for a month, then 3 days after the return window closed, it stopped heating
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your heating up the ring of the cup and heat does not transfer well.
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