It really helps when we're using it. (We need about 6 bottles stashed all around the house, in the car, in my purse, etc.) Our son (4 1/2 ) puts his fingers in his mouth, I ask him if he needs his thumb spray, and he says yes. At bedtime if I tell him to get his fingers out of his mouth, he'll ask for thumb spray. He hates the taste, but doesn't see it as punishment--he knows it's a "reminder" to help him. Our dentist commented at a followup visit, that his teeth were in a better position. Just wish every pharmacy had it--some don't know what I'm talking about, some thought it wasn't being made any more, etc. Don't stop making it, please! Tobasco sauce burns, but nothing else works!