I've got a couple of pairs of fine stainless steel tweezers that I got from my mother when I was a kid and started building models. I don't know the brands, though. One was made in Switzerland. As Don mentioned, stainless steel can be cleaned very easily with solvents. I also use fine steel wool, occasionally.
Asking your dentist is a good suggestion. But have a look in your area, at stores where beauty supplies are sold. You might find a good pair if tweezers, at a better price than a hobby supplier will charge.
The only pair I don't recommend that strongly, by brand, is a pair of kinked tweezers made by Squadron. That is, the point is "bent" about 15 degrees from the axis of the grip. I thought they'd be easier to use, but I find that I can't manipulate them or objects as easily as with my other, straight pairs. I use it more to pick things up off my bench, like toothpicks or other objects that are hard for me to pick up with my fingers.