Kashering Archives

I would like to Kasher my Fleishig oven to Milchigs, make some Milchig food and then Kasher it back to Fleishigs. I was wondering how I would go about that? My oven has a clean button.

An oven may be Kashered by turning on the self clean for a full cycle. When Kashering from Milchig to Fleishig one may Kasher even by leaving the oven…

I have an electric stove with a glass top, not an induction stovetop. Up until this point it has been used only for Fleishig. Can I use it for Milchig outrightly as we generally do with gas stoves or is this different? And how?

Electric burners with a glass stovetop are different than gas burners in that the glass will also need to be Kashered. Due to the extremely technical and halachic difficulties,…

A corelle Fleishig plate was found in the Milchig sink after being used for hot Milchig pizza. What should be done with the plate?

The plate should be thrown out, since corelle cannot be Kashered. In desperate situations, where one’s financial situation is tight, and throwing it out is a significant loss, there…

I just moved into a new apartment. The one that lived there before probably didn’t keep Kashrus. How should I Kasher the sink?

Kashering a sink: Which sinks can be Kashered: Only a metal/stainless steel sink can be koshered. porcelain and enamel sinks cannot be Kashered. Preparing the sink: The sink must be…

I just moved into a new apartment. The one that lived there before probably didn’t keep Kashrus. How can I Kasher formica counters?

Kashering a countertop: Granite countertops: Preparing the countertop: The countertop must be thoroughly cleaned. if any dirt is on the countertop it cannot be Koshered (generally speaking). A mere discoloration however is fine.…

Moving into a house previously lived in by a Jew who did not keep kosher. Treif working dishwasher. Can it be Kashered? Same with electric stove/oven.

Dishwasher: The standard approach is to be stringent and not Kasher a dishwasher due to the various concerns, primarily because it is not likely that the hot water cycle…

May I buy Keilim from someone who cooked food in them on Shabbos B’Meizid? How about buying kosher products that were cooked in these Keilim?

The Keilim may be bought but must first be kashered. Food cooked in these Keilim are forbidden. טעמים ומקורות: ראה מג״א שיח, א. פמ״ג בא״א. תהל״ד א. ובאו״א -…

Can a Fleishig knife that was used to cut cheese be Kashered? The knife had not been used for meat 24 hours prior, the knife and cheese were both cold. If so, can it be Kashered in boiling water? Please advise.

If both were cold, the knife does not need to be Kashered - just washed (NOT in hot water). #4297

By accident I fried Schnitzel with a coating that had a seasoning which contains milk in it. I was using a cast iron pan. How can it be Kasherd?

This requires a Libbun Gamur. This can be accomplished by putting it into his self clean oven for a complete cycle. #4066

Article: Are Public Hot-Water Urns Kosher?

A hot water urn that is available for public use in a place of business, work or school cafeteria or an airline kitchen may become Treif (non-kosher) when it comes…

A non Cholov Yisroel K-kup was used in our school Kuerig machine. Can it be Kashered?

Thoroughly clean the needles and K-cup pack holder as per the Keurig instructional video here. Pour in detergent. Replace the cup holder with a new K-cup holder (a replaceable…

Can I Kasher my oven for Pesach or during the year with a blow torch?

A oven can be Kashered with a blowtorch. However, using a blowtorch on the inside walls of a oven until it is red hot (what would be required…

We typically would not Kasher our year round oven for Pesach use. We have someone who wants to give us a used oven, is it permissible to Kasher it for Pesach to use on Pesach and leave it Pesachdik?

According to Halacha, one may Kasher a Oven for Pesach, though there are various levels of Chumra as to how to Kasher the oven. Some are Machmir not to…

Can granite counter tops that are sealed, be Kashered? What about a sink made of porcelain?

Granite counter tops that are sealed can be Kashered. See here. Porcelain cannot be Kashered.

Can/does one need to kasher a glass table?

Glass cannot be Kashered. If the table was used to put hot food directly on the table (or hot pots with liquid under it) the table is Treif. Make…

By mistake a Milchig cocoa powder mix was used to make hot cocoa in my Fleishig glass cups and one mug. Is there a way to make the glass cups or the mug kosher again, or do I need to throw them out?

The powder mix was put directly into the cup, and then the cup was filled with hot water from the urn. Then some almond milk was poured to top it…

Someone started warming up shntizel in my Pareve microwave and we quickly shut it before it got very hot, but it was already a little warm to the touch. Do I need to Kasher my microwave to make it Pareve again?

2. If I keep the microwave Fleishig: a) May I heat up Pareve items and then bake them in a Pareve/Milchig oven? For instance melting chocolate for a Pareve/Milchig cake…

שמעתי שיש בעיה בכלים חדשים שלפעמים מערבים שומן לא כשר ולכל צריך הגעלה. האם זה נכון? ואם כן איזה סוגי כלים צריך הגעלה? או שהכל ואילו סכו”ם

יש החוששים שמורחים כלי מתכת וטפלון בשומן מן החי בשעת היצור ודורשים להגעיל. למעשה, מן הדין אין צורך כלל להגעיל, והוא חומרא בעלמא. ויתכן שגם אינו בגדר מדת חסידות. …

Article: Kashering a Microwave

Cheese was melted in a Fleishig microwave. What should I do? It must be Kashered. Kashering a microwave from Milchigs to Fleishigs or from Fleishigs to Milchigs on a regular basis is not…

I washed my Pareve knife in the Milchig dishwasher. Soap in the first cycle. Is it still Pareve? If not, can it be Kashered back to Pareve?

If the soap mixes with the water before the hot water rinses the dishes, then it does not need to be Kashered. If this is not the case (this depends…