A method for determining whether a vehicle was washed at a carwash includes recording navigation data for a vehicle. The method further includes identifying whether the vehicle was located at a carwash based on the recorded navigation data, identifying at least one indication that the vehicle was washed while located at the carwash, and determining that the vehicle was washed at the carwash if the vehicle was located at the carwash and at least one indication is identified that the vehicle was washed while located at the carwash.