The Dyson DC07, DC14, DC15, DC17, and DC18 upright hand vacuums have a washable pre-motor filter that, with proper maintenance, should last the lifetime of your vacuum and never require replacement. Some Dyson models also include a washable post-motor filter. In order to optimize the performance of your handheld Dyson vacuum cleaner, you should wash the filter or filters every six months with regular use. Keep in mind that if you use your vacuum more frequently, the filters will require more frequent cleaning. Rinse and wash the filters with clean water and allow them to completely dry before reinserting them back into your vacuum.
Do not use detergent. It is essential that your filters completely dry before being returned to your vacuum, otherwise they could mold and decay. By washing your filters every six months and allowing them to dry thoroughly, you’ll experience many long years of usage out of your Dyson filters and cordless Dyson SV11 vacuum battery.
Dyson makes use of a technology called Root Cyclone or Radial Root Cyclone. Within a Dyson vacuum is a part called the “cyclone head.” Air is spun at extraordinary speeds, generating up to 313,000G force. While the air continues on to the filter, most of the dirt, debris, and dust is forcibly removed by centrifugal force into the clear dust bin. This allows your Dyson vacuum cleaner to maintain a constant, steady air flow while achieving no loss of suction. Most vacuums lose suction because the filters become clogged with dirt or debris, but with your Dyson, most of the debris is already long separated from the air before it even reaches the filter! That’s being proactive!