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[Clansgian AT wmconnect.com]

> Why do you fill and refill the jars three times?

Doing so heats up the contents enough to make a sterile seal on the jar.  On 
a domed mason lid, the contents has to cool and contract enough to  draw down 
the dome in the lid.  The operation I describe puts enough heat into the jar 
and its contents to seal the jar.