When the evolution of a thin film mixture of alcohol and water on an inclined plate is examined several interesting instabilities form. Where the base of the thin film rejoins the larger reservoir, small ridges form which slowly drift to the side and merge with others, coarsening into larger ridges. These instabilities are driven primarily by the alcohol evaporating more quickly than the water, forming surface tension gradients, thus causing what is known as Marangoni convection. My research focuses on figuring out why these ridges coarsen as they do.