Jeep 2011 Grand Cherokee - Owner Manual - Manual (Page 160)

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.
Mist Control
158 UNDERSTANDING THE FEATURES OF YOUR VEHICLE