I mainly use these brushes for cleaning. Both the flux and the solder I use leave a bit of a residue that I want to get rid of. I used cotton swabs, brushes (for painting), paper towels and even a toothbrush! For me, they hit the sweet spot. Not too expensive, you get 25 packs which should last you a while and won't fall apart easily even with vigorous brushing. No cotton swabs, no lint, no paper towels and no toothbrushes. All this is conveniently at hand, I recommend!
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