Hygiene in the home is an essential part of everyday life; particularly when it comes to the toilet. Duck 3in1 toilet cleaner consistently cleans; freshens and ?ghts limescale. With its unique action; Duck 3in1 helps keeping your toilet fresh and clean with every flush; leaving behind a long lasting fragrance.. Cleans with every flush. Fights limescale. Long lasting freshness. Units and refills are available in a variety of fragrances. Duck.