Love-Less Ash 4P20 Vacuum Brush Tool Horse hair cleaning brush. This is used for cleaning the ash off the window or your decorative logs in your fireplace or fireplace insert. Many times the glass of your pellet, corn, wheat or wood stove will end up with soot or smokey look as it gets dirty from running the stove. The brush will fit on the outside of your hose end to make cleaning your glass or decorative inserts easy.