- 1). Scrape off as much of the bird poop as possible with a plastic putty knife. Using a plastic putty knife does not scrape the flagstone surface.
- 2). Rinse the bird poop area on the flagstone with water to remove as much residual as possible. Mix a strong solution of washing soda and warm water in a bucket according to the directions on the soda package.
- 3). Dip a horsehair bristle brush into the solution and scrub the bird poop area with the brush.
- 4). Rinse the area thoroughly with a garden hose if possible. A garden hose with a sprayer allows you to apply pressured water to the bird poop area for complete removal.
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