AJS, I've never done it, but I know people that have,
I don't know how long you been smoking MJ, but if you have been smoking a long time, i know you have heard those little popping sounds before, thats spider mites popping, I know we have smoked plenty of spider mites before, over the years, by accident, and I'm pretty sure most long time smokers have too.
OJH, uses something called Greenclean, I think, I'm not sure that's the right name though, you can supposedly spray it on buds ready to harvest, I've never used it ,so I don't know. He will be on here in the morning about 5oclock, to tell you what it is.