So I am planning on starting to experiment with adding a winterization process to my technique for producing concentrate. Right now I am somewhat dissapointed by what I am able to make in terms of quality, I usually end up with rock hard oil that shatters and snaps easily and leaves a small amount of black residue on the titanium once I'm done my dab. It is very difficult to use this in my ThermoVape Revolution, so I want to see if winterizing my product will increase it's purity and viscosity so that it works well in the Rev. I live in Canada and have been looking all around the area which I live in to see if I can find pure Ethanol at any brick and mortar stores but have not had any luck finding anything pure. So now I am going to order from a Canadian chemical supply store but I want to make sure that I am getting the best kind of Ethyl alcohol for winterizing with. There are three variations of Ethyl alcohol available from the supplier I'm looking at, distilled, denatured and anhydrous denatured. I'm not entirely aware how exactly the winterization process works so I'm not sure which one of these three option is ideal. Any advice?