Break the filters off a couple of marlboro's and put them in a one pint solution of tap water in a spray bottle and let them seep overnight...when you first put your lights on lightly spray the leaves, don't saturate them, just a light spritz but get the undersides of the leaves. repeat again two days later.

I suppose if you wanted to be organic you could use those American Spirit cigarettes...the nicotine kills spider mites and aphids.