My 21 month old was driving me nuts with this. I didn't know if it would work this late in the game, but I got a cool nursing necklace (simple stone circle) from UBB, and let her know it was her "special" necklace, that nobody else could touch it, etc. It has worked for over 2 weeks, I think it's going to stick. She's completely transferred her attachment to it. Hurrah! Anyway, something to try (or try again).