Until recently this was a pain in the ass, because you could only adjust wiper speed via the touchscreen. This was literally my #1 problem with Tesla's UI.

However, they recently rolled out a software update that lets you adjust the wiper speed easily with the left scrollwheel.

The newest teslas don’t have wiper or indicator stalks. They don’t have functioning auto wipers or auto indicators either. Manually enabling wipers is buried in the center mount touchscreen. The indicators are tiny crappy buttons on the wheel that turns when you turn making them a pain on roundabouts.

The stalkless cars have a button on the steering wheel to select the wipers, and the scroll wheel adjusts the speed. No need to use the touch screen to control them.