FULLER® BRUSH FULL CRYSTAL™ IS THE “NO SCRUB” WAY TO GET SPARKLING WINDOWS! Power off grime from up to 20 outdoor windows on contact. Attach the special bottle containing cleaning powder to any garden hose—it produces a powerful stream that reaches up to 27 ft. Cleans through screens; dries without streaking. Ideal for siding, too! Harmless to grass and shrubs.