A combination of a metal rake and crystal cat litter allows the PetSafe ScoopFree to outperform other raking boxes. Whilst other self-cleansing bins with rakes tended to jam up and skip clumps, the PetSafe ScoopFree labored regularly, scraping up solids and carrying them into a squander compartment. Hi Micca, https://automaticcatlitterbox24691.pages10.com/everything-about-cat-litter-box-64560745