How to wash the fabric pre-filter?

We recommend washing the fabric pre-filter approximately every 15 days to ensure the maximum efficiency of the air purifier. You can clean it with a vacuum cleaner with a soft brush or machine wash it on a "delicate" cycle. Warning: do not iron the pre-filter. Never place a pre-filter on the device while it is still damp. Only the pre-filter is reusable and can be cleaned with water.