Over the years, many people have used and reused things that 'shouldn't' but got by with. I don't like to get it canned and then find that the seal didn't 'seal'.

Over the years, many people have used and reused things that 'shouldn't' but got by with

Well said. People do lots of things they shouldn't do. Sometimes for valid reasons but usually just because they don't know any better. Just because they do them doesn't make it right.

Deana - things change. Canning lids haven't been made from rubber for decades. They are silicone and silicone lids should never be boiled much less for 10 min.

I have a year on you and have been canning just as long but I have discovered over the years that it pays to put some of the old ways aside and learn new methods. Many things have changed since I was learning to can with my grandmother and she would be disappointed in me if I refused to learn new things just because I am now the age she was then. :)

Dave