I don't have a miracle diet to remove dampness but the logic from the herbal side of Chinese Medicine stills holds true - and that is to strengthen the spleen. The problem with this within the standard american diet (SAD) is that it is an uphill battle. To me, and what I counsel my patients on the most, it is all about restricition and control than adding anything else in to make it better. As most practitioners in our field know, you must eliminate milk primarily and strongly limit dairy, cold raw foods (salads/lettuce particularly). In addition to that eating, as much as possible, whole foods (any kind really), perhaps working in some ginger to the diet and/or mint teas, and eating much smaller meals when possible will go further than any other advice.
Most of my views on the subject are covered in the following two articles:
The "Eat Like a Human" Diet
My Spleen is What? The Earth Element in Chinese Medicine