How long do you boil? How long do you have to let them dry?
It's pretty easy, you take and blow through the atomizer at the battery end
to get all the old e-liquid out of the reservoir and then put them in a pan
with water and then bring the water to a boil, take the pan off just after
the water boils (maybe 30 seconds to a minute after the water boils) and
then set the atomizer on a paper towel with the battery end up so that it
can drain. Let it sit until it cools and then blow the water out and then
add a drop of e-liquid and a fresh cartridge, let the atomizer sit for a
little while to allow the e-liquid to get into the reservoir and then you
can use it again.
I let them sit over night so about 8 to 10 hours. Then before I prime it back up
i make sure all the water is out by blowing into it a couple of more times