Have you considered an ultrasonic cleaner? I keep flip-flopping on getting one. I know the principles are different, but in my head it's like trying to speed up the aging process of wine, which seems wrong in my head. Since I've been enjoying the Dripper Pro and Killer 705, I've been thinking that an ultrasonic cleaner would be a nice and easy way to clean the CE2 ceramic cups before popping in a new coil.
I have considered it and have started researching them a bit. From what I gather, there doesn't seem to be a consensus on how much it speeds up the steeping process but.... with me expanding my collection of bottom coil rebuildables, it is a really good way to clean the ceramics (my Killer gets here in a few days - cant wait) which may be enough for me to pick one up.