Wash hair
Shampoo smells strong, water finds its way into the eyes and fingers catch in tangles. Hair washing is several sensations stacked on top of each other. The pictures below pull them apart.
♂Wash hair
A person washes their hair with shampoo under a shower.
♀Wash hair
A person washes their hair with shampoo.
♀Wash hair
A person with bangs washes their hair with shampoo.
About this visual support
The reason hair washing feels so heavy is that every uncomfortable input arrives together. A strong scent fills the whole bathroom, the water runs in an unpredictable line and the fingers meet knots in the middle of everything. Three things that would be manageable on their own become overwhelming together, and it makes sense that the child wants it over straight away.
A visual schedule pulls the moments apart in time. When the child can see wet the hair, take a little shampoo, rub, rinse, and understands that the shampoo isn't there forever, the smell becomes part of a sequence rather than a constant state. In the same way, combing becomes its own station instead of a surprise in the middle of the foam.
A concrete tip for hair washing specifically: add a picture of a towel over the eyes for the rinsing step. That's a different kind of safety than just squeezing the eyes shut, and many children manage the wash a lot longer when they know the physical shield is part of the plan. You can build the hair wash together with the shower and drying into a longer routine in Routined, so the child gets the same calm order every time the hair needs cleaning.