If a home canned jar has botulinum in it can the jar be cleaned and saved? If so what is the correct way to clean the jar?
Typically if you suspect that a jar is actually contaminated with botulism the procedure is to leave it sealed and throw it away. This is due to the ability of botulism to become airborne.
The washing of old gross jars is usually aimed at high-acid foods that may have popped the seal and become mouldy, stinky, or just plain old.