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Tool training

ResponseCategory: HalachaTool training
Asks asked 9 years ago

Peace and happy holidays to Rabbi Michi
I have a few questions regarding the kosher nature of the dishes. It should be noted that I live in a house where I am the only one who keeps kosher and the rest are secular.
I would be happy if you could answer me in detail any questions and any advice or tips for the situation I am in. 
 
1. If I heated up food in the oven and microwave that I had already prepared with dishes that were not prepared but had only been put through the dishwasher (secular family members who came to clean up), do I need to prepare the oven and microwave again? If the stove was not used, but things were occasionally placed on it, what is the ruling regarding them?
 
2. If non-kosher utensils are placed in the place where I keep utensils that I have certified (they were certified, but then they were used for food that I trust is kosher, but was prepared in non-kosher utensils), what is the ruling regarding the utensils that I have certified? 
Do they need to be sterilized or is it enough to wash with soap? It should be noted that I don't know what utensils they used and put in my pile of kosher utensils.
 
Thank you very much in advance.

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1 Answer
Michi Staff answered 9 years ago

1. Regarding the microwave, if the food is heated in a closed container, there is no need to kashrut. Regarding the oven, this is usually food that is open to space, and the question is whether the food that was heated was leavened.
Regarding the stove, as long as the touch was not hot, there is no need to re-calibrate.
2. Anything that isn't hot is fine. Just make sure it's clean.

Asks replied 9 years ago

Is there any concern about ingestion/ejection with today's tools?

mikyab Staff replied 9 years ago

In principle, yes, although there are studies that examine this. So far, there are no agreed-upon results that are sufficient to change the halakhah on this. It also depends on what tools.

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