Hi vacmanuk/stephenbrown2,
I don't know that there's anything you can really do for a bagless machine except manually clean it, one way or another, if your disturbed by internal dust and dirt build-up. Doing so may mean having to consider warranty issues.
In any event, even for the fastidious such a task can prove pretty tedious work and I can't I imagine the worth of the reward for all that effort since the "clean machine" look only lasts for a couple of cleanings. (Vacuum cleaners are supposed to save the user time and effort, not make more work.) Clear plastic containers and airways on most bagless machines get grungy looking from use. Having no place to blow them out, the only satisfying solution to the problem I ever found was dismantling the collection bin and using mild detergent and water to wash parts offendiing my eye. Though I washed filters frequently, I didn't brave completely cleaning a collection bin and cyclones more than absolutely necessary. I took too long to feel assured they'd had a proper amount of time to dry.
Note: my bin cleanig effort was more to assure the machine kept operating properly than for aesthetics. I learned early that if airlfow in the cyclone area was hindered by dirt or debris build-up, filtration suffered. Anyway . . .
The cyclones should be allowing only the travel of air and very fine dust before incoming air's cleaned by the pre-motor filters. Ideally, stephenbrown2, particles as heavy as grains of rice should be immediately falling to the bottom of the collection bin though due to size and velocity they might loosen dust and dirt in air ways that lead to the bin.
Vacmanuk, the automatic censoring thing for whatever reason obscured what you input after the word cotton. If you meant cotton swabs, there's a company that sells the like with over-sized rayon tips that bear a stick length of eight inches. Sounds like a messy prospect but they might be used to swish around the inside and outside of individual cyclones and loosen adhering dirt. I don't know if stephenbrown2 will approve the cost of approximately $85.00 for a pack of 500. Please check out the following link but be advised I have no affiliation with Puritan, the swab's maker, or Amazon (other than giving them too much money).
http://www.amazon.com/Puritan-808-BULK-Oversized-Applicators-Non-Sterile/dp/B003IT75R6/ref=sr_1_20?s=industrial&ie=UTF8&qid=1322428561&sr=1-20
Best,
Venson
