Lexus 2015 RX350 Owner's Manual page 223

NOTICE
When the windshield is dry
■
Do not use the wipers, as they may damage the windshield.
When the washer fluid tank is empty
■
Damage to the washer fluid pump may be caused if the lever is pulled toward you
and held continually.
When a nozzle becomes blocked
■
In this case, contact your Lexus dealer.
Do not try to clear it with a pin or other object. The nozzle will be damaged.
2-3. Operating the lights and windshield wipers
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