Here's another recipe from Shift Your Habit for homemade glass cleaner:
Ingredients:
1 1/2 - 2 cups water
1/2 cup white vinegar
1/4 cup rubbing alcohol
1-2 drops essential oil (any scent you like)(optional)
Directions:
Mix all ingredients together. Spray on windows and mirrors.
Remember: Use old newspapers to clean windows and mirrors instead of paper towels.