If your jam is growing mold YOU DON'T HAVE ENOUGH SUGAR in your recipe. SUGAR IS THE PRESERVATIVE IN "PRESERVES".https://twitter.com/SQIRLLA/status/1282426595349848069 …
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Boiling water is another one of our ancestors' great preservatives/sterilizers and one should accept no substitutes Steam, maybe, but only if there's a lot of steam
You actually need steam and high pressure to kill spores, boiling won’t do it.
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