My wife stumbled upon a really great jar opener. It is so good at opening jars that even with arthritis she say she doesn't have much need for me anymore.
I bought one for my elderly mother, who used to set jars near the door to remember to ask me to open them when visiting. She has little use for me now.
Sometimes, even I (hard to believe right?) am defeated by a stubborn jar or lid...but not anymore! This sizes down to as small as a twist cap on soda or bottled water and enlarges to easily handle, say, a mayonnaise jar.
They are a bit pricey (Swiss made,over $20) but look on amazon or ebay for KHN 2560 to keep your cost down.
KHN 2560.jpg
https://kuhnrikonshop.com/products/t...per-jar-opener
*disclaimer* not actually intended to replace a spouse/helper/or significant other *disclaimer*