NBC and other media outlets have recently reported findings from a study released this summer in the Journal of Allergy and Clinical Immunology. The media reports that hand-sanitizers and being "too clean" can actually produce unintended effects, including greater incidence of allergies and asthma among children.
There are a wide range of natural substances that have been clinically studied to possibly improve Eczema, also known as Atopic Dermatitis. The founder of Heal Thyself! has done an excellent job of summarizing some of the more compelling studies on the GreenMedInfo.com database on the topic.