Separate the cover of the product.
Remove particles off of the ultra-fine filter with a vacuum cleaner or a soft brush.
If contamination cannot be eliminated after cleaning, replace the ultra-fine filter.

Separate the ultra-fine filter from the total filter.
How to separate the ultra-fine filter: Check the Velcro of the ultra-fine filter and carefully remove the ultra-fine filter in order to avoid it being damaged.
When you assemble the ultra-fine filter, follow the reverse order of the separation procedure.
Do not clean the filter with water. The service life of the filter may be reduced.
Be careful not to damage the ultra-fine filter when using a vacuum cleaner.
Take caution because there is a risk of tearing or loss when separating or assembling the ultra-fine filter.
In case of the dual model, clean the bottom filter in the same way.