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The following is from today's OU Kosher Halacha Yomis.</div>
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<p><strong><strong>Q. I am on vacation and would like to use the microwave in my hotel room. One must assume that the microwave had previously been used with non-kosher food. How should this microwave be
<em>kashered</em>?</strong></strong></p>
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<p>A. The microwave oven should be cleaned well and left idle for 24 hours. Therefore, if one is staying in the hotel for only one night, it cannot be
<em>kashered</em>. After 24 hours, a full cup of water should be heated in the microwave for ten minutes allowing the water to overflow and the microwave to fill with steam. Steam condensate should be apparent on all the surfaces, otherwise the
<em>kashering</em> is not effective. The cup should then be moved to another location in the microwave and again the water should be boiled for ten minutes.<br>
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The above <em>kashering</em> is sufficient to <em>kasher</em> the walls and ceiling of the microwave, but it is insufficient to
<em>kasher</em> the glass turntable, which is assumed to have had direct contact with non-kosher food. Instead, the glass plate should be wrapped in two layers of plastic wrap.<br>
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Alternatively, so long as the microwave is clean, one may use it right away, so long as the food is properly sealed so that the steam does not leak out. It is proper to double wrap the food, for instance with both plastic wrap and a paper bag. This way, in
case the inner plastic layer bursts, the food is still protected by the outer paper seal.</p>
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Professor Yitzchok Levine<br>
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