Toyota Verso-S Manual page 223

NOTICE
 When the windshield is dry
Do not use the wiper, as they may damage the windshield.
 When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may over-
heat.
When a nozzle becomes blocked

In this case, contact any authorized Toyota dealer or repairer, or another
duly qualified and equipped professional.
Do not try to clear it with a pin or other object. The nozzle will be damaged.
VERSO-S_EE
2-3. Operating the lights and wipers
2
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