So you have just stopped nute feedings? If they haven't had at least 3-4 big water flushes where the water runs out the bottom and at least 7-8 days with no nutes your going to wanna go with this stuff...
http://www.genhydro.com/genhydro_US/florakleen.html it's around 10 bux and my pot is so clean it's crazy.
Okay here's so you can learn from my mistakes.I figured out that the temp while drying is the key. The mistake I made was quick drying it too fast. The temperature was around 80-84 and it took 4 days for it to be dry enough for cure, that was a mistake, it could be smoother. The trick is to have temps around 70 degrees and make the drying take around 7-10 days. Then all you have to do is seal the bud in something airtight, keep it in the cool temps in pitch black and release and replenish air 2-4 times daily, resealing it each time. After 10 more days of curing you should a great final product, you can go longer with the cure if wanted. Hope this helps man,
~ BCbuddy