[header] How to clean outdoor tiles [title] Sweep the tiles daily. [step] Try to sweep your porcelain tiles every day or so. Use a soft, natural bristle broom or take a vacuum attachment and suck up the dirt. 
Regular sweeping will prevent your tiles from becoming caked with dirt and stained. [substeps] If your porcelain tiles lead up to an entryway for your house, you'll want to sweep them more often.