To achieve optimum suction power, the ventilation slots must always be clean.
The filter and filter cage must also be clean and dry. To check this, the
filter cage (8) by turning it anticlockwise (bayonet catch). The filter (9) can then be removed.
If the filter has been cleaned under running water as described in the operating instructions, it must first be completely dry before the full suction power is available again.
The suction opening and ventilation slots are cleaned with a dry cloth.