[header] How to clean a dyson filter [title] Locate your vacuum's serial number. [step] Look for a sticker on your machine. Write down the first three digits of the serial number shown on the sticker. 
The sticker may be in one of the following places: on the back behind the hose; at the base between the wheels; behind the bin. [substeps] If you're having trouble finding the sticker, navigate to http: // www.dyson.com/support/findserialnumber.