I was never a thumb sucker and none of my children were. I encouraged my children, if their babies showed a thumb sucking tendency to encourage a pacifier. Pacifier habits are sooo much easier to break than a thumb.. I mean the thumb goes everywhere the kid does... so far.. the pacifiers have worked and were stopped easily and painlessly...
The fact that she reconizes she is doing it and wants to stop... will make great strides. Good luck. Haven't no experience in thumb sucking, I had never heard of this " glove"... curious minds have to read now...