Leaf Miners are annoying but easily controlled. First take away all leaves that they are mining. A solution of dish soap for a few days will control them. We have more answers at our website www.gardeningdirections.com. Live from Jamaica.
If you live in North Orange County (CA), keep an eye out for a new magazine called Votre Fullerton. I have an article in first issue about some of the talented crafts people living in Fullerton. Find out more here: http://insidefullerton.com/votre/