I tried a new method a couple months back and have been using it ever since. I typically mix up 2 100 ml bottles of juice then rolled them up in a electric heating pad. I monitored the temp with my digital smoker thermometer and settled on setting the heat to around medium (150 degrees F). I would walk by and vigorously shake the rolled up heating pad about every half hour. I removed them about 4 hours later and gave an extended shake. I let them rest overnight and tested the next day...viola!