Had a problem with my headphones.

They're a pair of gorsun ear buds. No physical buttons but they do register touch capacitively.

After a tumble through the wash the two earbuds had become decoupled. I could pair both independently, but they didn't register as a pair of earphones but as two single earbuds.

Turns out I had to hold the button to turn them off, then hold the button to turn them back on (apparently that works on capacitive buttons), and when they were in pair mode I pressed both at once and the flashing light turned blue on both. After returning them both to the charger to reset them I could pair them both as one pair of earphones.

I know most people probably don't care right now about such a thing, but I like posting when I find a sort of unintuitive solution to a problem since I'm sure I'm not the only one to have the same issue and someone else might come looking someday. (In the past, I've clicked on a link to solve a problem, and it's like "oh! It's me! I solved this problem!" And I do whatever I said to fix the problem)