The herb would have to be wet to the point of not properly cured for it to effect function. Also I've seen other people mention they can't have a fine grind but that's all I use. I hold my Santa Cruz Shredder upside down and grind till zero resistance and this is almost as fine as a coffee grinder so I dunno why everyone else has a problem. Maybe tamping it down too much or... The battery issue I do notice though. I still get big clouds as the battery gets past 50 percent but I can't completely dark brown a load like I can at the top half of charge. Not a big issue because now I have a spare but it would be nice if it eventually doesn't do that with a firmware update since the whole reason for the chip in the battery is to supposedly regulate the charge so you get consistent use throughout the charge cycle and I'm still not seeing that. Also I keep forgetting to mention that I don't even use my glass mouthpiece. I got tired of making sure it was at exactly the right height for my draw so one day I just ripped that whore out and proceeded to hit it without it like a newer PAX that doesn't have the mouthpiece and now it's a perfect rip every time. So maybe those of you that are still having draw speed problems should try this until they get the new heatsinks in everyone's hands. I'm almost positive that the heatsink is probably the culprit responsible for giving people a negative experience at least 80% of the time. It fucked me over with a "Ghost" hit too many times to the point where I just said fuck it and I've never looked back.