You are here: Home › DIY › Use vinegar and hot water to clean your paintbrushes. Fill a small bowl with 1/2 vinegar, 1/2 hot tap water and soak for about 30 minutes. If you have a brush thats really dirty and has dried paint on it, put your brush in a small pot and cover the bristles in vinegar. Bring the vinegar to a boil and let simmer for a few minutes. Remove the pan from the heat and let it cool before you remove the brush. Once its cool, wash it with water and gently clean all the paint off.