you've smoked 12 spliffs a day for 15 years? why? even in my prime, i was smoking a blunt with a few bowls on the side a day, and that was a LOT of wasted smoke. you can only get so high, after a certain point you're just wasting weed, brain cells, and time. now, i smoke about a gram or two a day and i still stay high most of the day because of the way i smoke. mostly just kind bud out of my bubbler or glass bat, pack up about 1/4-1/3 gram, something like that. burn it all up in one hit, hold it in 30-45 seconds so its all absorbed, then i'm stoned for 4-6 hours, at which time i repeat. conservation is the name of the game my man.