big thumbs up for Screwfix no nonsense degreaser. its best stuff i have used by far and that includes paraffin. i'm very impressed. unlike paraffin you can wash this stuff off with just water and the grime just disappears.
i used it neat then tried 50/50 mix with water and the 50/50 was just as good. i used a pup spray bottle to mist in on then a paint brush and hosed it off, grime gone
ok so i would not go using it every wash but to get rid of the build up of crud once in a while would be perfect.