Microwave Kashrut
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Question
Is it permissible to heat food in a microwave located in a public place (the national library) that is also used by people who do not observe Torah and mitzvot?
Answer
Hello,
It is forbidden to use a microwave that is also used by people who do not observe kashrut.
It is quite possible that non-kosher foods, meat and milk, etc., have been used there.
When there is no alternative, it is possible to heat by wrapping the food in two tightly closed coverings to prevent the steam from connecting with the microwave's body.
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