I can not recommend this product enough! I loosely followed the instructions but pretty much used my fingers (with gloves) to smoosh the product lightly through the ends of my hair and up towards the roots. Just a light coating, I think I used about 1/20th of the huge amount of product and I left for about 15-20 mins and I’m so happy with the results. My mouse brown hair is now lovely and sun kissed and it looks so nice and natural. It doesn’t touch your scalp so there’s no need to worry there, it does stink out your bathroom though so open windows!! I will use again in the future, perhaps in the summer if I want it more blonde but for now it’s perfect.