I noticed that one of my attys was not drawing as easilly as another. I blew it out and it helped for a little while, but then went right back to being difficult to pull on (something I've actually grown to prefer since then). I decided to do a burn on it. I burned for 5 seconds, waited 5, then burned again about 4 times. From then on I tasted something burned. I tried everything, but after a few puffs on a new cart it would always revert to the burned taste. I had enough and decided to do a deep cleaning. I soaked the atty in a shotglass of pep-err cola

for about 15 minutes, then put it in a bottle with hot water for another 15 minutes and occasionally shook it up.
Being the impatient pessimist I am, I was not content to wait overnight and had assumed that (after reading this thread) it was dead. I put it in front of my air conditioner at full-blast for about 20 minutes and decided that was enough. I popped it into a battery, flooded it with cheap equid, and let 'er rip. After burning through about 5 drops I decided to actually inhale it, and lo and behold it works! There is still a slight burnt taste after 4 deep puffs, but it's barely noticeable. Take my experience with a grain of salt, as I'm sure others will tell you that what I did was sacrelidge
My logic is that the reason you're told to leave it to dry overnight is to not dry out the atomizer (which i solved by priming it and burning some equid), and to make sure no liquid gets in the battery (which shouldn't be as big a problem with manual batts). I figured that the surface area of the atty coil is so great it acts as a sponge, which sucks liquid from inside the atty, brings it to the surface, and gets blown dry with direct air. In either case it worked for me.