ergoline PRESTIGE 1000 INTELLIGENT PERFORMANCE Operating Instructions Manual page 138

Cleaning and maintenance
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– Remove the filter from the holder.
– Cleaning the filters when moist or dry.
Dry cleaning: Vacuum cleaner (depending on the degree of soiling)
Moist cleaning: Use water and detergent or put in a dish-washer
– Use a fin comb to clean the air conditioning's dirty cooling fins.
WARNING!
The device may be damaged by moisture!
The cleaned filters must be dry before they are replaced.
– Refit the cleaned and dried filters.
– Ensure that the filters are correctly positioned in the holder.