Toyota prius Owner's Manual page 404

4-1. Maintenance and care
CAUTION
 When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components etc. to catch fire.
 Precautions regarding the exhaust pipe
Exhaust gasses cause the exhaust pipe to become quite hot.
When washing the vehicle, be careful not to touch the pipe until it has cooled
sufficiently, as touching a hot exhaust pipe can cause burns.
 When cleaning the windshield (vehicles with rain-sensing windshield
wipers)
 When the upper part of the windshield where the raindrop sensor is
located is touched by hand
 When a wet rag or similar is held close to the raindrop sensor
 If something bumps against the windshield
 If you directly touch the raindrop sensor body or if something bumps into
the raindrop sensor
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Set the wiper switch to off.
If the wiper switch is in "AUTO", the wip-
ers may operate unexpectedly in the fol-
OFF
lowing situations, and may result in hands
being caught or other serious injuries and
cause damage to the wiper blades.