I had a lady bring in her then ( about 8 years ago ) 1 year old dyson dc14 complaining that it was not sucking, ( I love the dc14 I have sold hundreds of new and refurbed units They last forever and give very little problems )
I looked and the bin was full to the top, The very top/ I said had she tried emptying it and she looked at me and said "NO its bagless !!!" ................ So the dirt just evaporates does it ??