These brush cleaning bombs make cleaning your brushes easy! Toss one into 3 gallons of warm water, throw your brushes in, let soak (and be disgusted by the amount of dirt that comes off), lightly rinse, and let dry. Best Brush Forward cleaning bombs are made with all natural ingredients and lightly scented with natural oils. They are safe for synthetic, natural, and wood-backed brushes. They're also great for bell-boots! The brush bombs are designed to have maximum cleaning power with minimal excess foam so that they don’t require a ton of rinsing.