Replace the litter box once a year Over time, your kitty's claws and your litter scooper can make small grooves in the bottom and sides of your litter box. (petsmagazine.com.sg)
«The Jabulani was much smoother than the Brazuca with smaller grooves and ridges across its surface,» says Professor Leinweber. (sciencedaily.com)
Common ones included: hook; pin; to clean small grooves; make jewellery. (sciencedaily.com)