I guess i will be the odd one with a crazy method that seems to work....
I take the drip tips off my 808 carts (works for the smoktech mega dual coil too) put them in a pot 1/2 filled with water, then sit it on the stove and let it boil for about 5 or 10 minutes.
I drain the water, then run them under the clean cold water, put them back in the pot and re-boil them.
Once that is done and they have had a cold water wash, i blow the excess water out of them. This is will i get odd i guess I then take a tin foil baking sheet, put them on their side (not the ends) put them in the oven at about 400 or 475 (as my stove does not work properly) and bake them....yes i said bake them for about 20 minutes......remove them and set them out on a paper towel. If your in a hurry, about 1/2 air cooling and you will be fine....or let them sit that way over night, and your good to go. This can be done for a few metal atties to, but i do not recommend it....
Again this is my method, and i do not take responsibility if you try it and something bad happens (like the carts not working), i am just adding what i do to the idea pot on how to clean them