How to Clean a Franke Composite Kitchen Sink
- 1). Rinse the sink thoroughly with warm water. Apply two or three drops of dish detergent to a nylon scrub brush and scrub the sink thoroughly using a circular motion to remove any residue.
- 2). Rinse the sink with warm water to remove any soap residue.
- 3). Wipe the sink with a cloth or sponge dampened with white vinegar for hard water mineral deposits. For tougher stains, use bleach cleaner or oxalic acid powder cleanser on a damp cloth or sponge.
- 4). Rinse the sink with warm water.
- 5). Dry the sink with a towel.
Source...