Emptying a Dyson
I find that if I empty the Dyson bin immediately after using the machine, some dust will stick by static attraction and some flies into the air by static repulsion.
The best solution I have found, is to put the cleaner in a cool place and forget about it for a day. Then, before using it the next day, empty the bin straight into the rubbish bin.
I don't use the Dyson method of wrapping a bag about the bin, because:
1: you need three hands to hold, open and close the bin, and keep the bag in intimate contact;
2: if you're bending over trying to manipulate the bin and bag, you are more likely to inhale dust particles;
3: what is the point in using a bin in the first place, if you have to use a bag to empty it? You would be better using a bagged cleaner to start off with.
And it is all very well saying that you can use the free polythene carrier bags from supermarkets, etc., but they sometimes have vent holes, so no good for allergy sufferers. On top of that, the 'free' supermarket bags are going to be phased out and folk will be charged.
Furthermore I quite agree, Dysons are completely useless when it comes to large amounts of plaster dust, or chimney soot. The abundance of dust in the airflow must overload the high efficiency cyclones. In those cases a bagged machine is best.