Tip #6,826 • 10 people found helpful • 1 List After filling and closing your canning jars, resist the urge to push down the “button” on the jar lid. If the jars don't "pop" themselves, you need to process them a second time. Food & Drink safety cooking food storage Helpful... Share Share Tweet Send A Tip by Karen Borchert Data, food & running Please enable JavaScript to view the comments powered by Disqus.