Jeep 2015 Grand Cherokee - Owner Manual - Manual (Page 180)

If the end of the lever is pushed while the wipers are in
the off position, the wipers will operate for several wipe
cycles, then turn off.
WARNING!
Sudden loss of visibility through the windshield
could lead to a collision. You might not see other
vehicles or other obstacles. To avoid sudden icing of
the windshield during freezing weather, warm the
windshield with the defroster before and during
windshield washer use.
Mist
Use the Mist feature when weather conditions make
occasional usage of the wipers necessary. Rotate the end
of the lever downward to the Mist position and release
for a single wiping cycle.
NOTE: The mist feature does not activate the washer
pump; therefore, no washer fluid will be sprayed on the
windshield. The wash function must be used in order to
spray the windshield with washer fluid.
Mist Control
178 UNDERSTANDING THE FEATURES OF YOUR VEHICLE