same thing I do, though I actually suck (with my mouth) some star san up into it, then purge it with a super quick O2 blast.
I also remove the airstone from the wort with O2 still running so it blows stuff out...can't really fill with wort that way. sorta pre-emptive cleaning.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10