It really is best to thoroughly clean brushes at least once a week, more frequently if needed. They get full of all sorts of gunk such as makeup, body oil, and dead skin cells. Talk about a breeding ground for bacteria. Yuck! I don't want to keep putting that back on my clean face.
I like to pour a small amount of mild dish soap into a littlel bowl. Then I add a few drops of tea tree oil. Tea tree oil is antibacterial and antifungal and really helps get those brushes sanitized. Then each brush gets a dip in the solution, and I swirl the brush around on the palm of my hand and use my fingers to really get in between the bristles. I rinse under running, warm water until the water runs clear and the brush is clean.
Hang your brush to dry with the bristles pointing down or at least slanting downward. You don't want to let it dry with the bristles pointing up because water will cause the glue holding the bristles together to breakdown much faster.
Hopefully, I'm a newly-reformed brush cleaner now :)
How do you clean your makeup brushes?
Or do you?
Or do you?