MAINTENANCE & CARE 

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. 

SANDPAPERING

The expansion ring should be sandpapered from time to time (because of the lifting of the wood fibres). Frequent sandpapering is not recommended, however, as this makes the surface more delicate and susceptible. Only use sandpaper no. 180 or 200 and always sandpaper in the direction of the grain. 

WARNING

A minor patina of the wood may occur from washing and exposure to intense sunlight - making the wood darker. The patina may decrease after drying and sandpapering. 
Never leave objects in the same place on the expansion ring for a long time as this may cause light stain impressions.