First of all choose a scent free organic makeup for your makeup. And when you use it clean the brushes once in a while.
How to choose makeup brushes. Rounded thick brushes is to prefer. For powder makeup choose brushes of natural hair, and for cream and foundation either synthetic or natural will do.
How to clean Your makeup brushes fragrance free
Squirt a small amount of fragrance free schampo in a mug filled with warm water and, softly swirl your makeup brushes in the soapy water to loosen the oils and makeup. Dump out the water and repeat until the water runs clean.
If you have a particularly soiled brush, put a small amount of fragrance free shampoo in your palm and clean the brush by hand.
Put the handles of the brushes on a ledge or on top of a folded towel so that the water will drain down and out of the bristles. Let them air dry overnight and fluff in the morning. Use a blow dryer to dry, if needed.