John3m;
Hi. Since I was diagnosed with Parkinsons, I figured why when tweezing a part it flys off to "Never" land. So, to solve that I do two things now. First I make sure I am not squeezing as hard, and secondly Make sure all my tweezers have teeth to hold with. If they don't, Then I make teeth with 180 grip Emery cloths passed through their jaws. Don't laugh! It works!