Microwave
Question
Must a microwave be 'kashered' between uses of meat and milk? Does it matter how long ago the use has been? If so, does it matter if it was used for meat 25 hours ago but for pareva stuff 5 hours ago? What if you aren't sure how long ago it was used? If it being used for meat and milk is relevant, what about using the micro for just 25 seconds to warm up bread, after it is either flayshig or trayf. Does it make the bread flayshig or trayf in such a short amount of time? Please answer these questions also with regard to a toaster oven and standard oven.
Answer
Answered by Chaim Yisrael Abadi1. no just keep one always covered 2. no 3. n/a 4. n/a 5. keep it covered to avoid any problems. 6. either oven is not fleishig or milchig CYA