Usually I wait until I have enough coils to fill at least half of a shot glass. Then i dump them all in the shot glass and fill with vodka to cover all the coils. Let it soak overnight and rinse with damn hot water from the tap.
Then I was setting them outside in direct sunlight for the afternoon since our outdoor temperatures where we were living used to be around 115°f to 121°f during the summer daytimes. This meant our coils were dry in just a couple hours really.
In general when I've tried to use "wet" (with water) coils, it's made the tank I put them in, into a gurgler and I usually have had to remove that wet coil and grab a completely dry one. I don't know why, I've just assumed that the eliquid and water isn't mixing well and so the eliquid is dripping down the coil into the bottom chamber of my AeroTank and Nautilus tanks, so now I just make sure to use completely dry (dry of water) coils.
Even though I rinse out the coils when I remove them from the tanks initially in really hot water (about 104 to 106 or so, about what our water heater keeps our hot water at all the time) and they seem to be clear of most eliquids, every time that I've soaked the "rinsed and clean" coils in the vodka, almost immediately the bottom of the shot glass has brown eliquid showing up and so even though they seem to be clear of eliquid from rinsing them really well, it's apparent (for us anyway) that the vodka is loosening up some gunky old eliquid and or clearing out old eliquid that just rinsing in water didn't deal with properly.
Of course there are other times when it's not practical to do this process, in which case I don't bother rinsing out the coil, I just remove it, then wash out the tank, reinstall the used coil and take a half a dozen or a dozen vapes on the PV and just deal with the cross contamination of eliquids, eventually the old flavor disappears and the new flavor in the tank takes over. Of course some people can't stomach a really bad mix of eliquids, I've heard of some people that say when they do that the two eliquids that got mixed in the used coil made it taste like vomit to where they almost puked themselves.
Anyway, putting the used coils in vodka almost always makes the clear vodka turn brown or darker for us, where as just sitting them in a shotglass of water usually doesn't produce nearly as dark of a glass of liquid as the vodka does (for us).
