What are some signs that a home canned product is unsafe to use ?
If you have any doubt about the safety of a home canned product, follow the old advice of when in doubt, throw it out! Never taste food from a jar with an unsealed lid or food that shows signs of spoilage. As you use jars of food, examine the lid for tightness and vacuum; lids with concave centers have good seals. See the following sites for more detailed information. http://ohioline.osu.edu/hyg-fact/5000/5338.
