I've merged your two threads into one Kimberley
How old is Coco and what colour? I expect the fluffiness is due to him being castrated, but if he's a puppy and is liver coloured those may contribute towards the fluffiness too. I know a couple of people on here who have liver coloured working Cockers that aren't neutered and have had similar problems.
You could try using a Mars Coat King to see if that helps, but clipping might be your only solution in the end. I was able to continue hand stripping my neutered orange roan show type boy for a year or more after castration, then used a coat king and thinning scissors for a few years, but eventually had to resort to clippers and thinning scissors.