Rabbi Aryeh Lebowitz

So they won't touch the hand matzahs.

So others are mocked, but no, they only eat the hand matzahs.

They don't trust machine matzahs.

The Rebbein was complaining to me this morning that in one of the Kasher Pesach guides, last year's version said, or two years ago's version said, you cannot kasher a dishwasher.

Last year's version said you can kasher a dishwasher.

This year's version said consult your local Orthodox Rabbi whether you can kasher a dishwasher or not.

So there's a lot of confusion out there, what can and cannot be kashered in terms of dishwashers, microwaves, these kinds of things.

for Pesach.

So I wanted to discuss some of the issues.

We'll see if we get to both dishwashers and microwaves.

There are some very good articles on the topic by Rabbi Jachter in his Gray Matter Volume 2.

But a little bit of a basic background is that the Torah in Parshas Matos tells us that if Kelim have non-kosher flavor in them, they need to be kashered.

But there are two basic ways of kashering something.

There's what we call Libun.

If something was used on fire, let's say something was used directly

on a barbecue without any liquid medium.

So then the only way to kashrut is with a very, very intense level of heat.

That's what we call libun.

That would be, libun gomer would be like 950 degrees.

It would be some extraordinarily intense level of heat to the point where sparks fly from the item that you're heating where it turns red hot.