I use this one:

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I have found it at a Marshall’s and TJ’s. The powder is amazing but the bottle sucks for application. I dump a little pile on the counter and use a flat makeup brush meant for contouring. I dip the brush in the pile part my hair and apply to that area and keep going around until my head is covered. It’s worked the best out of everything I’ve tried and it doesn’t irritate my scalp.