most commerial indoor bud is chemically fed and often not flushed properly if at all. they want large, fast yeilds. organic bud will leave a grey ash where as chemied up bud will leave almost a black hard ash. you can water cure the bud wich will take out alot of the shit and make it alot kinder on your throat.

basically submerge your bud in water for a couple days at least more if you want and then take it out and hang it to dry or however you prefer. you will see alot of shit in the water that came out the bud and it will be alot smoother.