Avoid exposing the leather upholstery to direct sunlight, excessive heat or sharp objects. Use a clean, dry cloth to absorb spills. Use a vacuum cleaner with a soft brush for regular dust removal. Do not use household detergents, ammonia, oils, varnishes, etc. Oiled oak: Thorough cleaning of oiled oak is recommended. Use an oil treatment 2-3 times a year or as needed. Clean with soap shavings for general cleaning.