Have you tried a long low heat final purge,i am using a heat lamp dome with an incandescent buld to keep it around 115-120 F for about 16 hours,winter temps make the process take longer for me,cause in the summer i jist throw it under a pyrex done in the sunlight,and let nature take care of it for me
Yeah I only purged it at low heat for about an hour I guess it takes quite a while then?