I cut a very hot hard boiled egg and found a blood spot inside. Does that make the knife not kosher?


Question continued:

If yes, can I kasher the knife? How would I kasher it – it has a plastic handle? Its a knife that is usually used to cut onions and other sharp foods



If it was a regular commercially produced egg, the knife remains kosher and there’s no need to kasher it.



See here:

Halacha2go #468: Checking Eggs