DD's birthday present on Saturday, she loves it. Sunday, my dad's bloody stupid dog - no, sorry - my bloody stupid dad let his dog run all over it with muddy paws! Tried cleaning it with water as per instructions which has got the worst off but there are still great big paw prints all over it. And there are already a couple of bits that would seem to be permanently blue - presumably from pressure placed on it by crazy springer spaniel. It's not unusable but it would be nicer if it were cleaner! Any ideas?