Have your tweezers flattened out and lost their spring? Close the tweezers with a pencil placed halfway between the hinge and the points to increase the bend. Then they should grip again.
This is a great reminder that so many things can have their lives lengthened with really minor repairs/adjustments!! Try to fix things before tossing/replacing them....
You just have to pay a few dollars to ship to them. I mailed two pairs and they came back in a nice plastic case. If they cannot be sharpened, you will get a coupon for half off your next pair. Tweezerman tweezers are expensive, but are of high quality and will end up being cheaper than other brands in the long run.
You don't have to replace your dull tweezers. This tip works on expensive tweezers that have gotten dull and makes cheap tweezers as sharp as their more expensive counterparts.