I've done a search on this site and google and all that keeps coming up seems to be on how to boil regular cartos. Anyone know a thread I can look at, or video link? I bought 3 packages Kant/8mg, RY4/8mg, and 555/8mg but I'm really not satisfied with the 8mg so I bought a 30ml bottle of 555/18mg and I'm wondering when I use all these cartos up, how do I clean them and refill them with the new juice?