Q: I recently had a flagstone patio installed in my backyard. I love the patio, but I also love having my bird feeder, so the flagstones are covered with bird poop. I routinely take down the feeder at ...

It was long thought that uric acid was what made bird poop white and so difficult to remove, because uric acid crystals are white and don’t easily dissolve in water. Many websites still blame uric ...