Hi Terry
I also recently found with my BTS that her head was the last part of her body to shed...at least, she shed the rest of her skin in a day, but her head took a little longer. I managed to fix the problem by soaking the area with a damp cotton ball,(or the plastic container idea is good) then VERY GENTLY lifting the old dry scales Only do this if they come away easily - do NOT pull, as it can hurt and damage your bluey. The head has such large scales on top, I found they lifted away under my fingernail very easily. I also had to gently lift away the skin on the side of her face under her eyes.
As James said, toes can be a problem. Once my bluey had trouble shedding the skin from one foot...giving the bizarre appearance of 5 little toes growing off the end of her right big toe!! I soaked her foot and eased off the wierd appendage by gently rolling it bewteen thumb and forefinger (not before taking a photo though!) Also check the tail, elbows and shoulders, as tight rings of old skin can remain which inhibit the circulation.
Good luck, and let us know how your bluey does.
Susan