Don’t Paint Dirty Walls. To clean a wall, use two buckets. Load up your rag or sponge from your cleaning-solution bucket, and scrub. Before redipping, rinse the sponge in a second bucket filled with clean water. Use 50% simple green & water. For more tips you can visit us on YouTube & Facebook @ “idahopainters” See us on the web www.idahopainter.com