Has anyone used this? Does it work? The adverts for the Stop Itch say that it is 99% effective for sweetitch and it only needs to be applied once a week. Which would then make it good value for money - it is quite pricey at roughly £25 a 500 ml tub. I don't think my boy has sweetitch but he does rub at his mane and tail when the midges are out though not to the extent that I have seen some poor horses do when they end up almost hairless