There are a few things you can do to remove sap from a car window. The first is to use a vacuum cleaner with the hose attachment to suck the sap out of the window. The second is to use a bucket and pour water onto the window and then use a plunger to suction onto the top of the bucket and pull. The third is to use a cloth or paper towel and place it over the top of the plunger and push and pull until all of the sap has been removed.
