I've noticed in a few of my cartos that the cotton or whatever around the outside is turning dark, like brown or something. Is that normal? I don't know if I should toss them or what, but I felt I was being careful not to dry them out too much.
Another thing - I can never get 16 drops in my cartos. I get maybe 10-14 at the most before it overflows into the middle. I have set them aside for a couple minutes to try to let it soak in to add more, but it did little good.