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Is anyone knows the fast way to remove residual alcohol from the concentrate? Even after vacuum oven, concentrate has approximately 5400-6000 ppm of alcohol. The allowable limits in our cities between 50 - 300 ppm. I know one method using a hotplate stirrer. This method thoroughly described on skunkfarm site. First I cannot process a large volume of concentrate and second it take almost 2-3 days. I have to say that method works but makes oil slightly darker. I've heard that people use a slow cookers for it. I would appreciate the advice