Light Scattering Films (LSF) on automobile interior glass surfaces were studied on 35 vehicles. The principal chemical compounds that caused the LSF were identified along with the primary sources for these chemicals. The LSF composition and amount found on the windshields exhibited extreme variability. The causes of this variability are discussed. The health and safety of the occupants exposed to the extremely low levels of volatile airborne precursors of the LSF were also studied. Finally, the techniques are presented to: Measure the tendency of a material to contribute to the LSF. Characterize the composition of the LSF. Minimize the LSF in future automotive interiors.