DD1 had a dummy but only for bedtime, in the end we got sick of her waking up and wanting the dummy put back in so we thought best way to go was cold turkey! This if i remember correctly was before she turned 1, so she didn't have it as long as ur DD but personally i think cold turkey is the best way, and make sure u throw ALL dummies out so if and when u have a rough night/day your not tempted to go grab one and give it too her!

If i remember correctly we only had one rough night! Goodluck with it all!