Do not clean the analyzer when the power is on. Do not use any organic solvent such as petrol, thinner lacquer, benzene compounds and things that may erode the analyzer to wipe it. Do not clean the LCD with water. Do not use anything that may scrap the strip table and white benchmark to wipe the strip table. Do not use any solvent to clean the white benchmark. If there is apparent scrape on the white benchmark, contact the supplier.