Ah fair enough, if you have allergies then you don't want to take the cyclone apart at all, which you would have to in order to wash it.
Dyson don't mention that in their 'look how easy our machines are to empty' marketing do they?
What you want is a nice HEPA bag you remove, pop a cover on the hole and bin!
Unless your near Thame, Oxfordshire then good luck! If you are then bring it over and I'll blow it out for you!