Power Phaser is good I've heard but it has been known to have adverse affects and burn the skin of sensetives horses and I mean burn (blistering) due to what's in it, so please do a small patch test before using it if you horse has been known to be sensetive to other products, a complaint was made to the company so they may have changed what they put in it since.
i make my own fly spray - there are some really good recipes on the net for natural concoctions - all the ingredients can be found in health food shops and in the kitchen cupboard
smells garlicky though so be warned - but works wonders
Ooooh thanks SU, that sounds like the most cost effective option so I think I will try that. Failing that (ie if I run out of patience/enthusiasm) I will look in my local saddlers for the ones you guys have recommended. Thanks everyone
Yep, Phaser has my vote too. Shop around, it's £3 cheaper in one of our local tack shops than in the other!!
I have tried loads of people's home-made recipes in the past, but none were that efficient. I'm in two minds whether to try mixing something up again, or stick with spending loads of money.