I wash mine every couple weeks, more or less depending on how much I've been using them. I usually wash them with clarifying shampoo but I don't have any basis for that other than the fact that I want to use up this shampoo!
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Fashion is art you live your life in. - Devil Wears Prada | formerly ttara123
I haven't been too good about this lately. Normally I wash mine using eye makeup remover or just plain makeup remover mixed with water. I also do a quick "wash" using the sephora brush cleaner wipes. They don't do a deep clean but they are quick and I can use the brushes right away.
Ideally once a month. That being said, I don't think I've actually done it in 2 months. I use shampoo and warmish water them lay them out to dry on a towel. This reminds me that I really need to do that this weekend.
I try to do it weekly, though lately I've been busy and haven't kept up as often as I'd like. I use my regular face wash to wash them. I figure it goes on my skin, and they go on my skin...
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"Good taste shouldn't have to cost anything extra." - Mickey Drexler
Ideally, once a week. Lately it's been more like twice a month.
I use shampoo on most brushes, and face wash with salicylic acid on the grimy ones, like my foundation brush. I read salicylic acid cleanser works well on grimy makeup brushes.
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Know first, who you are; and then adorn yourself accordingly. - Epictetus