My hair has a tendency to get greasy VERY quickly :( sadly for me! Only the day it's washed (which is normally in the evening after work) and the day after is it in an acceptable condition, after that I rely on the most marvelous dry shampoo in the world :D Charles Worthington Front Row for brunettes.
Having tried many dry shampoo brands, this is definitely the best I've come across and have not bought any other dry shampoos since. I've tried James Brown before, but found that although it did the job of hiding the oiliness, it also made it look like I had bad dandruff. I've also tried the famous Batiste in 'Blush' and although the scent is lovely, I find that it leaves hair a bit too silky (mine' already very silky), I prefer a more matte look. So although also brilliant, I just think CW is more suited for my hair type which is very silky and long.
Charles Worthington Front Row for Brunettes is brilliant because the spray colour is not white like most it's actually dark brown, so it'll never look like you have dandruff because it doesn't show up white, which I think is the downside to most dry shampoos.
As I said, unlike Batiste for example, this has a very matte finish and hair does look like it's literally just been washed, and feels great too. It doesn't have a nice fresh or floral scent, but it also doesn't smell horrible.
Another reason why this product is great is because whether you want to (like I most often do) just spray it on and rub it in after a few minutes to tie your hair up and go, or whether you want to brush it out and style your hair after, it works perfectly for both!
I most often end up spraying and blending it in with my fingers the tying up my hair, but also, sometimes I'll just brush it out and it'll look clean and fresh and full of volume, because the spray also gives amazing volume!
See below for embarrassing before and after pictures :P
I use mine about 2 week sometimes 3 times. It comes in a 150ml bottle and lasts me for months, so it's extremely good value for money at £5.49 in Boots and in the CW website. This is a product I will purchase and purchase again and I'm so impressed with it that the next two products to try from the CW range will be the volumising mousse and sea spray! Stay posted!
Top picture oily hair and dry shampoo before brushing. Below picture, after brushing.