Rabbi, can you please clarify the practical rules for utensils?
When buying a new pot, pan, knife, cup, or appliance, how do I know if it needs tevilah, a berachah, kashering, or nothing? Does the material matter?
Also, what are the rules for using utensils from non-kosher restaurants or public/shared places, such as forks, plates, cups, microwaves, kettles, or other kitchen equipment? Does it make a difference if the food is hot or cold?
And if I buy or use a secondhand utensil, how do I know if it needs kashering and/or tevilah?
If possible, could you give a simple practical rule to follow for new, used, and public utensils?
See https://kashrut.org/project/kashering/ for laws of Kashering. You only need to kasher pots, pans, and utensils that are used primarily on the fire for cooking. Regulare silverware does not need kashering. Plastic and Glass do not need Kashering.
Tevilah is required when you buy any item that touches the food itself. Steel gets a Beracha, glass does not. Electronic items should not be toveled. Simple solution is to sell it to a non-jewish person like a housekeeper or a coworker for $1.
And then just Have them leave it in your house.
I know it’s a kind of trick, but this trick works. The items are owned by a non-Jew and do not require tevilah.