The present invention provides a process for producing a polyurethane emulsion, capable of continuously producing a polyurethane emulsion which contains substantially no organic solvent and also has excellent storage stability over time. Glass is initially crushed to a diameter size of about 2 millimeters. Consumption specification data associated with the one or more vehicles are retrieved from a storage device. A counter determines at least a portion of a time that begins a delayed time after the commutation, and ends when the current reaches the peak value. The wet and dry disposable cloth sweeper may be a cleaning kit having a cleaning head, a handle, and optionally cleaning pads.