The Maestro Air Purifier should be cleaned once every month. Use a clean, dry, soft cloth to wipe the external surface. Do NOT stick any foreign objects or your fingers inside the unit. Do NOT use petrol, benzine, thinner, alcohol, solvents, harsh cleaners, etc. on and/or in the unit while cleaning as they will damage the product.
The Combination filter should also be cleaned once every month.
There are 2 sections to clean, the pre-filter and the remainder of the Combination filter.