Cyclone disassembly
Its a few months since I cleaned mine out, but these are approximate steps on how to do it..take pics as you go along to aid reassembly!
Pull off the plastic 'funnel' section from the bottom of cyclone unit- it just friction fits into place. May take a little force. This should expose 3/ maybe 4? torx screws on the underside of the cyclone assembly. May need to dig out the fine dust first to see them if its very dirty!
From there it should be reasonably self evident, there should be another set of screws from the underside once the next plastic moulding is removed.
Finally there are 3 on top, one hidden..remove the two screws holding the handle onto the cyclone manifold. The handle should then slide towards the front (e.g. towards the bin emptying button direction)- this will expose the final screw.
Once you have it separated out into all components, wash them- I find biological washing powder really good for this, and scrub with a soft brush. Rinse well, dry, reassemble..and vacuum!
Let us know how you get on. I always like to get my vacuums as 'like-new' as possible, even if I'm just going to use them daily!
Rob