Toyota 2015 Prius Owner's Manual page 459

CAUTION
When adding washer fluid
■
Do not add washer fluid when the hybrid system is hot or operating as
washer fluid contains alcohol and may catch fire if spilled on the engine etc.
NOTICE
Do not use any fluid other than washer fluid
■
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle's painted surfaces.
Diluting washer fluid
■
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bot-
tle.
PRIUS_OM_OM47A17U_DVD_(U)
4-3. Do-it-yourself maintenance
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