Teenage daughter and her dummy

Help! A lot of parents give advice about how to wean their young child off the dummy but my 15 yr old daughter still takes a dummy!! I've tried taking it off her at night and throwing it in the bin. I've tried dipping it in salt and putting it back in her mouth. I've taken pictures of her and posted them on facebook to embarass her, but nothing works.

If i do throw her dummy away, she will go and find another one off the street and wash it then suck on it at night.

My youngest daughter came off her dummy at 2 and she is now 8.

Help!!!!

Prohibition is not a good solution for any problem. Discuss, find the reason why she needs a dummy. Perhaps, she is unhappy, insecure, maybe she needs more affection.

Give time and talk to her one on one.