Syoss Pure Fresh Dry Shampoo (200ml for ca. £6)
Grey hair, don't care!... Except... I do care, Syoss, I do! Like, seriously, don't you specialise in haircare products? Clearly not this product. It says that there is no visible residue after brushing it out. Well, unless I am very blind and am also hallucinating, yes, there are dandruff-type flakes that appear in my hair after I have brushed everything out. Now, I apply my dry shampoo the night before, to let it "suck in" all the oils (that's how you technically need to do it -- not on the day). First, it makes my hair look grey (even after sleep and brushing out), and the flakes start appearing. Yay, Syoss, you failed. Congratulations.