AK brush cleaner 3.0 fl.oz is a gentle them most of the other brands because it has Glycerin, Panthenol (Vitamin B-5) and many other good ingredients to prevent frying out the brush.

Directions to use brush cleaner: Spray bristles of the brush with the AK brush cleaner. Using a paper towel squeeze the brush between thumb and the forefinger, gently removing all traces of makeup. Air dry before use.