Wipe the expansion ring frequently with a clean, dry cloth in the direction of the grain. Dirt, stains, etc. may be removed by applying a solution of 2-3 tablespoons of soap flakes per litre water to the expansion ring and scrub with a clean brush in the direction of the grain. Wipe off immediately with a clean cloth wrung in the solution (never leave the expansion ring wet).
Frequent washing with a soap solution reduces the lifting of fibres and increases the natural resistance of the surface.
NOTE, the appearance/colour of the wood will change when cleaning. Therefore it is recommended to clean all plates in the expansion ring at the same time.