I have a very similar problem, which I have partly solved. Try a few of these ideas, see if it helps.

1) Scalp must be uber-clean, try using Fairy Liquid (stuff you use for washing dishes) after shampoo, then shampoo again

2) An alternative to scalp protector, spray-on elastoplast is quite good

3) No glues stay long for me, but try Perfector Plus, I get a few days from that

Best of luck