All women are aware of buildup from products on their make-up brushes and many are aware of a build-up of other things like mold. Washing the brushes is a recommended preventative to this however washing also creates the risk of exposing the handle to moisture which can cause it to erode away. Thankfully there is Reddit to the rescue with a unique tip on avoiding corrosion. Simply use a hair tie to tie the brushes to a bar so the brush is pointed downward. This will allow the brush to dry and the moisture moves in the opposite direction of the handle hence prolonging its life.