Make sure your volume is turned up all the way to hear this tutorial! I had tried 3 different methods to getting the mold (grayish black stuff) off my patio but to no avail. Finally I discovered this method with just a quick trip to Home Depot, $9, and some elbow grease my patio is beautiful again! Also find out my tip for keeping the mold from returning!
How to Remove Mold and Mildew from a Patio (without using a pressure washer)!

Wht water repellent did you use? Thanks!
Thanks for the info! One thing: Your wearing gloves for the same reason you shouldn't be wearing flip flops. The Clorox could splash on you feet.