So here lately with all the FDA stuff I've been seeing a lot about clean rooms & how sanitary different manufacturers juices are. I was just curious if anyone here knew how sanitary cigarette tobacco is, as in how well it's washed / handled / how often it's contaminated by misc. debris for comparison. I tried googling, but was only able to find legal doctrine. Would anyone happen to have a link to a study or similar to shed some light on the subject?