Some scooters have a maximum of IP 54 dust and water resistance. A pressure wash would require IP 56 and it's usually even discouraged on bicycles since it could ruin bearings. Scooters have a motor, controller, battery+BMS, screen etc.. Water damage leaves a mark on devices and if it comes out in repair, warranty is immediately void. Riding in pouring rain and through puddles is discouraged - water and electric mobility devices don't mix!