Video explanation from "la Casa di Titto"
While washing the doll with him (or leave it completely to him) spell out the words well and repeat each action in your voice. This also applies when you are in the bathroom to wash your little hands: e.g. “turn up the tap lever, hot water comes out, get some soap, now wash your little hands, rub rub rub”. This way she will memorize the sequence and it will also help with her language skills.