What kind of capacitors in these devices are holding charge as much as even a couple minutes? Seriously. No other type of gizzard will outlast a condenser, I'd reckon. Leave the power switch on and yank the plug for quickest depletion, I say... 20 to 30 seconds should be entirely sufficient.Let the network stay in this powered-down state as long as you can. (Minimum 2 minutes, an hour+ is ideal, in my experience).