How should I clean and store the HPA5100 Air Purifier?

Clean the air purifier at least once every 3 months and before extended storage using only a dry cloth on the external surfaces — do not use water, wax, polish, or any chemical solution. If the unit will not be used for more than 30 days, remove the HEPA Filters, Pre-Filter, and Enhanced Odor and VOC Filters and store them each in airtight plastic bags. (Page 8)