Hi, it's Allie from Crucial Vacuum!
Maintaining your unit's filter clean and clog-free is crucial in keeping your unit working properly. Your Dyson DC39 has a washable and reusable pre-filter, part number 923413-01.
Washable filters are recommended to be washed after every 1 or 2 uses and replaced every 3 to 6 months, depending on the use of your unit.
First, make sure your unit is 'off' and unplugged. Remove the dust bin by pushing the button next to your unit's handle and remove the filter from the bin. Wash your filter under running lukewarm water until the water runs clear. Allow your filter to air dry for 24 hours before placing it back into your unit. Do not use any soaps or detergents and only dry your filter naturally. Placing your unit in a dishwasher and/or dryer may damage the filter.
Having a spare filter is a great idea to have while washing the unit's filter.
You can purchase direct your replacement filters from Crucial Vacuum with free shipping and an exclusive 10% coupon for Fixya.com readers, use code: FIXYA10
http://www.crucialvacuum.com/dyson-dc39-pre-filter.html
I hope this was helpful. If you would like further assistance, please feel free to give us a call at 877.750.9239. We have helpful and friendly customer care representatives on the line ready to assist you.
Alejandra (Allie) Sepulveda-Rivera
Crucial Vacuum Customer Care
http://www.crucialvacuum.com
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