Best Way, Cheap, especially if you're getting other stuff:
http://www.monoprice.com/products/product.asp?c_id=109&cp_id=10902&cs_id=1090201&p_id=5173&seq=1&format=2
Alternative:
You could mix about 50/50 Isopropyl Alcohol and Water....No rubbing alcohol. I usually put them both into a...