My husband made and canned pickles 1 week ago. Tonight he noticed the seals were popped on all but one jar. One other time the same thing happened when he canned green beans. What would be the cause of this?
You should not re-use lids, so they should come in good condition, although you can give them a visual inspection for dents, dings, and missing sealant before using them.
However, it sounds like perhaps your jars are not being properly processed to develop their seals if so many are failing. The University of Missouri Extension provides this list of things that might have gone wrong:
- Failure to read and follow instructions on package for using bands and lids.
- Leaving wrong amount of head space when filling jars.
- Not removing particles of food, seeds, seasonings, or pulp of fruit from the top of jar before putting the lid on. Also, watch for threads from the cloth that is used to clean the rim of the jar.
- Screwing band too tight can cause lid to buckle.
- Not screwing band tight enough.
- Insufficient heat to seal the lid.
- Failure to exhaust (vent) steam - pressure canner for a full 10 minutes.
- Letting pressure in canner fluctuate.
- Reusing jars in which commercial food is sold.
- Using warped, rusty, worn bands, or old commercial caps instead of home canning brands that are in good condition.
- Reusing lids. The lid of a two - piece metal cap should not be used more than once.