Sadly she worked that one out years ago - lick the stuff off quickly and get it over with. Tried bandaging it up and she just sucked the other one. Bandaged both up and she sucked it with the bandages. Tried getting her older brother to make fun of her (wasn't difficult) just made life miserable for us all.
I used to suck the first 2 fingers on my left hand - really badly - until I fell off my bike and took all the skin off them (no, really, ALL the skin)They were splinted and bandaged up for weeks and it was really painful. When the bandages came off I never sucked them again....It is sometimes tempting but I would never do that to her.
(On the other hand I have often wondered if I really fell off my bike or was I pushed???)
I think we will just have to hope she sorts it out for herself one day and try not to grind my teeth down completely with rage in the meantime.

I had a dummy until I was 7 or 8 (well I say dummy, in those days they were teats!)
Even now to this very day I suck on the ends of my finger nails (when they are long enough) I believe it's just a habit that carries on through your life....you just substitute the dummy, thumb etc for other things like chewing pencil or pen tops and things like that.

At least it's not a blankie your trying to wean her off.....that's a very difficult one to get rid of, I went through that twice with each of my sons.
With Austin I also had the problem of him putting anything fluffy up his noes constantly.....really shoving anything he could pick off clothing, carpets, even the poor dog's hair would end up going in his nose.....and when he discovered the tumble dryer, now that was hell to cope with I'll tell you!

Have you tried drawing a little Thumbelina onto her thumb, so if she sucks it then, Thumbelina would get sucked away also she just might enjoy having little people drawn onto her thumbs and now she's off school for 6 weeks she wont get told off at school for having it on.

If that fails tell the dentist about her thumb sucking and ask him to have a word with her.....that worked perfectly on my kids!

Maybe try the whole your thumb is shrinking line. I remember when I sucked my thumb it looked smaller than my other one.
You never know it could put her off! It's worth a go anyway right

Sorry to upset you Angela but the new toys are already out I was looking at them with my son the other day. They have even made a Optimus Prime voice changer helmet which of course my son wants to add to his Darth Vader and Cyberman ones!