Rad,
If you are a "Green" gardener ( I'm NOT), you could try a tablespoon of dawn detergent and a teaspoon of boric acid per gallon of water and completely submerge the plant for ten minutes every 5 days for three weeks. Or, if you really hate the little buggers, go for the chemical option:
Having grown a vegetable garden for almost 50 years I have had a lot of experience with spider mites. Whatever you use on them, the little suckers eventually evolve resistence to it. Having said that, there is a chemical initially developed from and modeled after nicotine called imidacloprid. Anything you can obtain containing imidacloprid should do the trick for you. If you can't find anything with imidacloprid, buy a pack of cigarettes and boil a couple of them in a gallon of water and spray the result on the underside of the leaves.
One word of cauton: Pregnant women should avoid contact with boric acid.