Lexus GX 460 2020 Owner's Manual page 214

NOTICE
When the rear window is dry
■
Do not use the wiper, as it may damage the rear window.
When the washer fluid tank is empty
■
Do not operate the switch continually as the washer fluid pump may overheat.
GX460_OM_OM60R28E_(GE)
4-3. Operating the lights and wipers
213
4