Quote:
Originally Posted by KAM+6
But 30 second outdoor cleaner at HD or Lowes, hose attachment sprayer. Leave on for at least 10 minutes to work in shade, rinse. Twice a year maintenance.
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Yes, that works and I've done it with good results. Up north my concrete patio was very black on that concrete I used "Wet and Forget" it's about $35 for a small container, it doesn't work overnight but give it a few months and it will clean up the mess.