When rolling out from a crosswind landing, more and more aileron should be applied to keep the upwind wing from rising. Since the airplane is slowing down, there is less airflow around the ailerons and they become less effective. At the same time, the relative wind is becoming more of a crosswind and exerting a greater lifting force on the upwind wing. When the airplane is coming to a stop, the aileron control must be held fully toward the wind. Remember, if the upwind wing starts to rise during a crosswind landing roll you should immediately apply more aileron pressure toward the high wing in order to maintain directional control.
Do you want to know more? The Airplane Flying Handbook and other FAA manuals are available here.
This Approach and Landing safety tip is provided by the FAA Safety Team because loss of control on landing is one of the top ten reasons reported for accidents or incidents.