If I had a pound for every repellent that has been recommended to me and didn't work i'd be rich by now. I'f I could find one that actually did work I'd be even richer. The fact is that none of these chemicals were ever developed specifically to deal with the midge,they are usually made to repel mosquito bites and to a greater or lesser degree work against midges too. eg: I've used paint stripping, eye burning 90% deet only to watch the midges land on the freshly applied solution like it was some kind of garnish. I feel I must give special mention to the Avon product that is lauded by some, in my experience it is completely useless and the latest in a long line of snake oil remedies. Some swear by it though and good luck to them. Bug jackets like the one Toddy mentioned are good and worth their weight in gold, even a head net is great . Setting up camp in a breezy area is best ,it's surprising just how little air movement is required to keep them off you. In a canoe or boat 30 feet from shore they seem to leave you alone. The deer take to the hill tops in summer to get relief from them and I have done this too,altitude is no friend of the midge. The best advice I can give is to remember THE WIND IS YOUR FRIEND.