posted 4 years ago
I suppose my first question is, “Is the lid sealed?” That is, push down on the lid. If it clicks, it is not sealed. In which case, the contents need to be safely disposed of.
As a side comment, after the jar has cooled, remove the ring. It makes it easier to open the jar later.
If there is one thing the Wizard of Oz has taught me, it is not to trust school teachers on bicycles.