How does a double wrap keep kosher food from becoming trief in a non kosher microwave?
Answer:
The double wrap ensures that no hevel (steam) comes into contact with the non-kosher walls of the microwave and then with the food. The contact of steam with the walls and with the food ‘contaminates’ the food with the taste of non-kosher food. The double-wrap, which ensures that there is no contact, is the solution to this problem.
Note that the wrapping must be leak-proof, such as two Ziploc bags or Saran Wrap.
