Dodge 2008 Durango - Manual (Page 146)

Windshield Washers
To use the washer, push in on the washer knob on the end
of the multifunction control lever and hold while spray is
desired. If the washer knob is depressed while in the
delay range, the wiper will operate for several seconds
after the washer knob is released. It will then resume the
intermittent interval previously selected. If the washer
knob is pushed, for a period greater than 1 second, while
in the OFF position, the wiper will wipe approximately
three wipes, after the wash knob is released.
To prevent freeze-up of your windshield washer system
in cold weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This
rating information can be found on most washer fluid
containers.
Washer Fluid Switch
146 UNDERSTANDING THE FEATURES OF YOUR VEHICLE