So, so glad you posted this thread- cuz I was having the same trouble a few weeks back. I've been using the double boiler method, good results, but time consuming as I've been making small batches (for my own testing, and gifts for family). I have now purchased a presto pot, and was wondering the same thing, how to keep the wax warm after transferring to a pour pot/pyrex to mix the fo. I hadn't thought of using a pyrex glass measuring cup to mix in the fo and then pour- I'm going to have to try that out.... thank goodness for all the experts on this site!!