3. Add the glass-cleaning solution. Spray the cleaner to one side of a towel. A microfiber towel is best if you have one, and begin cleaning. Use long broad strokes and work from one side to the other for a cleaner, clearer result.very car nerd has their favorite brand or formula from ammonia-based glass cleaners to TSP or simply soap and water. If you choose to use ammonia, be careful not to spill it on any vinyl, leather or rubber your vehicle may have. Keep in mind that ammonia is very harmful to a variety of materials.