YSK it takes little to no strength to open glass jars

Hit the unopened lid with a butter knife and make dents in the lid and it will slide right off without a fight. Only adding this because I know of two elderly people that had no clue and actually the older man was becoming depressed that he needed help opening jars. It's not very impressive and honestly I thought they would know it, so now I hope all of you do to. Don't fight the jar!