Hey Tony-How is it soiled?
I see efflorescence on the face of the stone.
 Is it just set in soil? what type of install-if there isn't some type of drainage there could be a moisture issue- 

On Sun, Jun 24, 2018 at 1:05 PM, Fred Hueston <fhueston@gmail.com> wrote:
I would just clean it with an alkaline cleaner..Im sure Stu will have something

On Sun, Jun 24, 2018 at 12:45 PM, Tony Warney <tony@excelstoneandtilecare.com> wrote:
Would like some input. Have a patio with this type of flagstone that is heavily soiled.
What would be the best ways to clean it?
Thanks

--
Tony Warney
Excel Stone and Tile Care
760-788-9400

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Frederick M. Hueston
www.stoneforensics.com
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Regards,
Stu Rosen
201-446-1200