Reprocessing Unsealed Jars Remove lids from unsealed jars and discard. Check the sealing surface of jar for tiny nicks or cracks. If the jar has defects, discard it and replace it with another jar. If not, add a new lid and process for the same amount of time within 24 hours. Storing Canned Food Clean the outsides of sealed, cooled jars.
Canned products are best if eaten within one year.
Accidental Freezing Freezing may cause food in jars to spoil if the jars become unsealed. Freezing and thawing cause food to soften and lose eating quality. Protect jars from freezing by wrapping with layers of newspapers. If Canned Food Spoils Examine jars carefully before tasting fruit. Check lids for a vacuum seal.