I have a screened (sides and top) concrete patio (lanai in FL). I've stained the concrete with concrete stain. Every time it rains, the dirt that has collected on the top screening washes down on the concrete patio and imbeds itself in the concrete, making it very difficult to clean. I'm looking for something to cover the concrete with -- tile, a finish -- that will be easier to clean, and look more decorative than a plain concrete surface. Any recommendations?