How to Clean Franke Granite Sinks
Franke granite sinks are made of stain-resistant non-porous granite and acrylic resin. These sinks are not immune to stains from mineral deposits,however if you clean these sinks daily you can prevent these and other problems (such as soap-scum). In addition, Franke recommends rinsing and drying the granite sinks after each use (see reference). Unlike porcelain enamel sinks, Franke granite is not smooth. The sinks are not difficult to clean, but because of the texture, you will need more than a soft sponge as your cleaning tool.