My daughter suddenly started screaming blue fits when having her hair washed, so I went into TV Presenter mode and pretended to be talking ahead into a camera, while talking like a blue peter presenter, presenting how a princess washes her hair, with a few jokes about some grumpy princesses thrown in. Total co- operation and giggles too, worked a treat with a few things, now she asks if we can do it with a variety of tasks or activities just as a game.
Also she was a nightmare putting her tights on in the morning, making a real fuss about the toe seams, causing a really stressful start to the day. Her Dad wasn't too pleased when she changed one day and was fine when I put her tights on, but not him. He asked her "why don't you whinge when Mam does it?" "Because she's been on a course on how to put tights on!" she replied. I just give a little contented smile and said that Dad should book himself a place!