Mine don't.
I've spent hundreds over the years on new tweezers every time mine vanish never to reappear. I should buy shares in Tweezerman 🙄
I keep them about me at all times to tackle the meno chin hairs that sprout daily. They literally vanish into thin air from the general location of my person on the sofa.
Tweezers after tweezers after tweezers. Pink, blue, silver, gold, big ones, small ones, cheap ones, expensive ones. They all go and same way .
The fuckers almost never reappear. Not in the washing machine. Not in pockets. Not down the back of the sofa (I've checked) not in the vacuum cleaner (ditto).
Sometimes, the odd one will briefly pop back into existence in a make up bag or somewhere I've already searched, only to dematerialise again permanently after a few weeks.
I'd conservatively estimate that 50 of them have vanished in this house over the years, never to reappear!! Where are they all???
Does this happen to anyone else?