I too look to have an Aphid problem. Bloody creatures ruin the entire planet
I tried 100% Neem Oil concentrate, at 0.01% diluted in water, and a few drops of dish washing liquid, still didnt seem to do much. Not sure if the Aphids are tolerable to the stuff, or if I didnt cover all the plant properly.
Anyway, Neil from TheHippySeedCompany put me onto some lemon rind in boiling water, cooled, then a few drops of dish washing liquid. Not sure if its done the trick, but I think its definitely reduced the numbers. Might have to repeat a few times.
The problem I find is the damn things lodge themselves inside the flowers buds. Now if the flowers buds dont pollinate quick enough, they manage to destroy the entire thing, so I've had flower drop galore recently.