Homeowners can achieve a clean and fresh-looking kitchen sink by adding two teaspoons of baking soda and squeezing in half a lemon, it has been suggested.A good living advice piece by the Hindustan Times claims that such products should be poured around the drain and should be left to sit, rather than being washed off immediately.To maintain shine, put olive oil on a cloth and rub the sink dry with it, it added.Elsewhere, the newspaper observed that spots on white ceramic and stainless steel kitchen sinks can be avoided by keeping a dish towel handy to rub the sink dry after use.It also advised people with brass sinks to use a soft scrub brush and some mild liquid soap or detergent before drying it off with a soft towel until it shines.Earlier this week, a report in USA Today claimed that flexible, open-plan kitchens are becoming increasingly popular as homeowners look to derive the maximum efficiency from their properties.