Just wanted to chime in on what I perceive to be my first fail, and it is Perique. Purchased a tin of Robert McConnell 100% Perique from P&C. This stuff was suspect when I first opened up the tin. It was damp,dark and dreary and smelled like most descriptions I read about it, earthy, mushroomy, kinda spicy smelling. The wrapper inside the tin was leached brown and very damp. Being a noob, I even gave P&C a call to see if they had any other complaints about it, but they assured me that this was characteristic of this tobacco type. Ok... I took their word for it and proceeded to prepare it for extraction. Did typical prep, glass jar, covered with 100% pg, But did a heat assisted, 36 hr @ 150 deg. allowed to cool opened and gently stirred in a little more pg just to top up a little, and putting it away for a few days to a couple weeks. I've been having very good results with this method. Anyway after about a week I decided to give it a smell, and to my amazement it had taken on a slightly sweet, I guess almost a fruity aroma. I thought, this might actually turn out pretty good. So I put the lid back on and gave it a few more days to sit so I could clear up my filtering gear. Got the extract back out and proceeded to separate it from the rough. After I had the extract out and in the measuring cup that I used, I gave it a little swirl and took a deep nose hit to see what it smelled like now. It really had a pretty good smell, but lurking in the background of that smell was the distinctive aroma of ammonia. Not good! Ever so slight but very distinguishable. I'm not really sure whether the heat may accelerated or re-triggered an already fermenting process. I never detected any ammonia odor right out of the tin. I went ahead and filtered it and put it back into the jar to give it a little steep time. Sorry to go long winded on this post. After couple weeks I had to open it up and see what was happening to it. Still had a little hint of ammonia but it seemed to be almost gone. I decided to pull just a little off it to make a small sample and put the lid back on and put it away. Mixed the sample at about 20% 50/50 12mg nic. The taste I got from the vape was... sour. Not a fruity on your tongue kind of sour but a sickening sour on the exhale. It's terrible. I did about 3 pulls and put it down, dumped the sample and immediately cleaned the tank. I just don't think steeping will help this, I could be wrong but it just seems very bad. I may try to do this again but with better Perique and a straight cold soak. I think the heat may have caused some of this but the quality of the tobacco seemed to be sub par also. My intent was to use it for blending with some other extracts. If this is characteristic of this tobacco then I'm afraid me and Perique won't have a future.