Our most recent article, as published in the Mt. Democrat newspaper
What Can Cause a False Seal?
By Monique Wilber
UCCE El Dorado County Master Food Preserver
A false seal can occur when jar rims are not wiped clean before processing, if a jar is not filled correctly, or if products are not processed correctly. Jars may appear to be sealed, but may come unsealed later. (If a jar does not seal at all, place it in the refrigerator and re-process it within 24 hours.) Wipe jar rims firmly with a damp cloth or paper towel to make sure the rims are clean before applying the lids and rings.