For years now, I've offered free consulting to any hardware company that has a product with buttons. Why? Because most companies don't have a UX department, and bad UX hurts their bottom line. Tiny and inexpensive changes, like a better label or a simple software tweak, could make a substantial difference.
I've written about it here: https://jenson.org/free3/
This isn't a gimmick. I'm lucky to be retired and don't want their money.
This is just me throwing my hat out there one more time...