Ah great! I'm just looking for information about how to use citric acid solution to clean brush because vinegar takes up too much space, and I don't really like the smell of it. Thinking of citric acid since it's also a weak acid, but I was not sure if it damages the brush.Every 6 months I soak my badger brushes in a citric acid solution to remove soap scum from deep within the knot, as that's what causes breakage/shedding.
What's the concentration you used to clean it? I calculated for similar pH value as vinegar and was gonna try for 1/4~1/2 tsp with 250ml water. It could be helpful to know some sure-to-work value.
Citric acid monohydrate costs USD ~2 for 1kg (~650ml) here and I believe it'll be enough for over 200 uses.
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