i have been smoking for many years, but the last year or so and especially the last 6 months i have been coughing up a lot of black.... one factor is i have increased my smoking but not by much... i smoke every method including the vaporizer and i smoke cigs on occasion (give or take 5 per month)... I usually force it up, i just hock it up from deeeeep in my lungs (i cough the most up in the morning and after i eat something for some reason)