Twelve tubes of effervescent brush cleaner Brush Therapy in a pop-up display box. Brush Therapy rids your brushes of dirt, debris, bacteria and fungi in just 8 minutes. Dissolve contents of one tube (1.78oz) in warm water. Trapped hairs loosen and comb out easily, leaving your brushes sparkling with a great citrus scent. Rinse thoroughly. Gently air dry cleaned brushes. If your brushes have wide, thin wood backs (typically ovals) it is best to soak the bristles only in a shallow tray.