Kohler K-5818-3 Hartland 33" Double Basin Top-Mount Enameled Cast-Iron Kitchen Sink -

Single person use not a family and less then a year of use. Nothing hot is put in the sink ever (pots, pans, dishes, etc). Never did that even of the stainless steel sink. They are left to cool first. If pouring heat water from a pot, the cold water is turned on first and allowed to run around the sink not directly into the drain to keep any hot liquid from contacting the sink bottom. The hot water/liquid is poured slowly directly into the drain. The same procedure I have used on stainless steel sinks and another sink. Bottom of sink started yellowing and is pretty noticeable since sink is white in color. Use silicon mat to protect sink from scratching. Always rinse the sink after use and use regular dish soap to wash pots and pans and do a final wash of the sink with a soapy sponge before rinsing pots, pans and the finally rinsing the sink with cold water. Have been using baking soda for 30 years to wash the Vision (i.e. glass) cookware if I needed to use it (I fill the pots with water to soak overnight on the stove top). Dish soap, baking soda nor another mild sinking cleaning agent works to remove the yellowing. Sink just looks off. Lightly colored sink is not for a kitchen. Rethink your color choose as you will be disappointed quickly.