This is not the fastest, easiest or most practical method, but it's my method and it's the most effort full with a care for health and integrity of the bear oil - basically the bear oil "cold press" method. The method I recommend is so slow, it's almost impossible due to its impracticality; but read the article and take what you can from it. Heat, light, and air deteriorate oil. Rancid oils will sting your throat, and can taste like "nuts" from the bulk bin Ile. These rancid oil do all sorts of damage to your brain and body, like taxing your body for antioxidants and inducing inflammation. I SPECULATE that in the past, the extra tallow or fat (as with the bear there is much) was oftentimes submerged in running rivers until one was ready to render it. Just don't leave them there too long or un guarded. At home, you can cut away the extra fat and submerg it in water using jars or steel pots, then store it in the fridge untill you can render...