She is 14 and has dyspraxia and sensory issues. She has long straight very fine hair which often looks greasy. I don't think she is rinsing properly. I've given her some tips - make sure hair is sopping wet before putting shampoo on, don't use too much shampoo, only rub into your scalp and keep rinsing for ages.
It doesn't make any difference, it still looks dull and greasy and she's really fed up.
Any ideas please? Are there any shampoos she can try that are easier to rinse?