Colour great at first, 3 weeks in no coverage left on greys!

The pump dispensing system was fiddly, difficult to pump out as you had to keep squeezing the bottle whilst putting on your hair with gloved hands therefore it went every where and it seemed like there was a lot of wastage of the product.
Having done the tester, i left it on for the longest time to cover a scattering of greys. Was absolutely thrilled to bits with the colour, felt as if i had spent pounds at the hairdressers.
Unfortunately within a couple of weeks the greys were completely back to grey, no colour on them at all. Will have to keep applying this once a month, I think I will try and find the same colour in the normal bottle type not foam - the foam was supposed to make it easier as you used your hands to apply but i still did my hair in sections for even coverage so foam was pointless. Also the foam was quite thin and watery and not a lot came out on each squeeze making the whole application process a lot more time consuming. When you first 'made' the foam, you need to squeeze the bottle a couple of times which aslo wastes some of the product, I have shoulder length hair and was worried there wouldnt be enough.