Save on windscreen washer
In order to get rid of dirt, grease streaks, fly remnants and birdies ... from the windshield during car driving, countless manufacturers recommend their respective windscreen washer additives. The success is usually moderate to not at all, the costs are neatly high. The certainly successful and many times cheaper alternative is the use of a x-any dishwashing detergent (do not use a cleaner for vending machines!). A few neat drops in the windscreen washer tank are sufficient to get the annoying grease from the windshield. Add antifreeze in winter. Alcohol is also (cheaper), but stinks terrible.