Jam
this stuff up your nose twice a day and you'll feel a lot better.
I started using it last year along side my normal anti-histamines and what a difference. Now the weather doesn't affect me at all. I may be a little sneezy in the mornings on real bad days, but otherwise it's business as usual!
One tip, if you can stand it, avoid alcohol and excess dairy during the hayfever season. Alcohol will nullify the effects of the anti-histamine and dairy makes you more snotty.
That's my experience of living with the nightmare of hayfever for the last 39 years.