For daily cleaning of furniture with eco-sustainable, water-based finishes, simply use a dry or slightly moistened cloth, while in the case of persistent stains use a vegetable sponge with mild soap and water. No oils or waxes should be used on furniture containing water-based finishes. Chemicals should also be avoided as they may corrode the varnish and create additional stains or halos. When cleaning flat surfaces, motion should be horizontal or vertical and be parallel to the grain of the wood as much as possible. It should also be remembered that real wood furniture exposed to direct light changes its colour over time. This change is considered to be a natural process of oxidation of the raw material.