If the oven surface is plastic there are different opinions whether kashering is effective, but in case of necessity many poskim follow the lenient view. Kashering between meat and dairy can be done immediately after the previous use, while kashering a non-kosher oven requires a hour downtime. In all instances, kashering must be preceded by a thorough cleanup. As is true of a conventional oven, kashering can be bypassed even for a non-kosher microwave by double wrapping the food.
An opinion not mentioned here is that a microwave does not need to be kashered, and can be used for both milchigs and fleishigs as long as the surface is clean. I kind of am suspicious of this because i have had matter splattered over the walls, especially if the receptable was not covered.
While the methods mentioned may be satisfactory to kasher the bliyos of zeias issur, there is a serious practical problem maybe what frumladygit meant that particles of food can be trapped in difficult to reach places or even inside the vent and fan. No form of hagala can kasher mamashus issur. Which is why you must clean the microwave thoroughly first. I was once told by a rav that I should be machmir if possible. What Frumladygit might be thinking of is kashering a microwave for Pesach, not for general usage.
Because we are much stricter about even a minute amount of chometz, many Poseks hold that the microwave you use during the year cannot be thoroughly cleaned for Pesach because there might be chometz in the parts she spoke about.
However, this is not applicable during the year. Many Rabbonim are very familiar with the mechanics of all appliciances — they have to be in order to answer the questions we bring to them. CR is fine for shooting the breeze on these issues, but anyone who relys on anything they read here about kashrus or otherwise is really in need of some serious guidance.
If that would be correct- you could not even TOUCH the microwave-just like you cannot touch a red hot regular oven- and this is obviously incorrect because the actual microwave oven and its walls remain very cool to the touch. As i explained, there is a very different principle of physics involved here and this is why it is very possibly to use the oven for multiple uses.
ItcheSrulik: cleaning thoroughly will not help for particles trapped inside the vent and fan , unless you completely disassemble your microwave. First of all we do not pasken the Rashba. Additionally, if heating very moist items, the walls of the microwave can get very hot. Finally, you have NOT solved my problem that the water vapors can contact mamashus in the vent and return to the food. ROB: zeia is mentioned in siman While practically the dry heat of a conventional oven will not produce zeia only reicha, as you mentioned, the nature of a microwave is to excite specifically the water molecules and create a very significant cloud of steam.
This is certainly zeia with all the resultant Halachos that will be difficult to overcome. Learn more. Kashering a microwave Ask Question. Asked 11 years, 10 months ago. Active 2 years, 3 months ago. Viewed 13k times. How can I kasher a microwave? Improve this question. N N 2, 1 1 gold badge 20 20 silver badges 32 32 bronze badges. Add a comment. Active Oldest Votes. From the OU : "How is a microwave oven kashered to change the dairy or meat status, or to kasher from non-kosher use?
Improve this answer. Shalom Shalom k 5 5 gold badges silver badges bronze badges. You assume it requires kashering. Curiouser Curiouser 7, 1 1 gold badge 30 30 silver badges 44 44 bronze badges. The Star-K is a bit slippery on this topic and they change their position usually without notice as they better understand the technology.
Check back with the Star-K from time to time to see if they change again. I am allergic to grapes. Is there an alternative way I can make Kiddush — perhaps on a different beverage?
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Torah Portion. Remembering the Mensch of Malden Mills. I, Pencil: The Movie. Our Modern-Day Hanukkah Story. Saying Hello to Hanukkah. Hanukkah and the Secret to Jewish Survival. Our nanny heated up non-kosher soup in our microwave. Can we make it kosher again? Thus, to make your microwave kosher, do the following steps: Wait without using your microwave for 24 hours since it was used to cook non-kosher.
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