I had an older friend who had trouble opening jars and would have a whole line of them on her counter, waiting for me anytime I was expecting to come over. I told her that when we went shopping, she should separate jars that she was going to be opening immediately at home and ask the checker to open them for her and then close them again so that they would not be sealed when she got home. then we go to Safeway, and she presents the checker with several jars which he good nature takes and start struggling and struggling and struggling, and cannot open one of them, which he then takes to another checker who has the same trouble. Finally the third one is able to open it and bring it back to her. They were seriously embarrassed.