After a couple years, the brothers began making plans to renovate their business model based on the lessons they had learned. One of these involved finding a more efficient way to service customers than the carhop young women, whom they considered slow, unreliable workers who spent too much time flirting with customers to increase their tips. Another was that hamburgers accounted for a large proportion of total sales. The griddles were much easier to clean than grills and burgers were faster to assemble than sandwiches.