If you do want to purge it further,like overnight,a heatlamp will get it to about 120f and long purge it,the longer it sits at a reasonable temp the more anything trapped will purge,,since its winter where i am,i cant sun purge anymore so i use this method indoors,at this point the fumes are negligible,one note is that when the majority of the iso purges from the pan you will smell the "essence"/"aroma" of the oil cooking off,this is usually the point i take it off to check it,if its a really thin layer it will probably be done,but a thicker layer may have some trapped underneath and in between,hope this helps..orhers may have a different opinion and that cool cause there is more than ine way to skin the cat..also i welcome others to chime in,thats how we all learn..im gonna document another iso run tonight,ill post here..