Post it's won't stick to Coopers nose, they fall off before he even lifts a paw, or he just shakes his head to get rid of it

I have used a hairband thingy, but I'm stuck...

He will put his paw over his nose, to try to get the hairband off, but he doesn't make the connection. I have been trying for ages to get him to do it, but no luck. Mostly he will get annoyed and lie down. So I have given up on this trick for now

I've only tried it once with Jinx. She usually is a lot faster to pick up on things, than Cooper, but again, I get stuck.
I must be doing something wrong

I am hoping to go to a dogdance workshop in september. We have to bring a list of tricks we want to work on, and this one is on that list. Maybe the trainer can give me a few tips
