All are good suggestions, but I think KBacon nailed the biggest problem, the nail polish remover. The oils in it will keep glue from bonding. Denatured (not rubbing) alcohol, acetone, MEK, even water are good cleaning solvents.

I've also run across a lot of vanes that have that oily parting compound left on them from the manufacturing process and they have to be cleaned off too. I think a couple of brands come with a chemical coating on the base of the vane to help them bond, so they should not be cleaned. I'm not much of a vane user and don't remember the brands right off. Maybe someone else can name them.