* WD-40: WD-40 is a water-displacing lubricant that can also be used to remove stains. Spray the WD-40 onto the stains and let it sit for several minutes. Then, wipe it off with a clean cloth.
* Rubbing alcohol: Rubbing alcohol is another effective cleaning agent that can be used to remove stains. Apply the rubbing alcohol to the stains and let it sit for several minutes. Then, rinse it off with water.
* Commercial glass cleaner: There are a number of commercial glass cleaners that can be used to remove crepe myrtle drippings. Follow the instructions on the product label to use the cleaner safely and effectively.