|Check your labels!|
Today I was starting to can dill pickles and realized I had no white vinegar. Off to the store I went. I remembered the discussion we had in the Master Food Preserver class about vinegar. Did you know that 4% acidity and 5% acidity vinegar can be sold side by side on the grocery shelf? You could have accidentally picked up the 4%. You must can with 5% acidity vinegar. Somewhere on the label it will tell you, but, you really have to look for it. It's in really small print. Go ahead and clean your windows with 4% vinegar, but please don't can with it!