1. The right solution
You can buy a ready-made window cleaner, but if you want to save your money or try natural methods you can make your own at home.
All you need is white vinegar, water and a spray bottle.
Simply mix together two cups (480ml) of water with a quarter of a cup (60ml) of vinegar and add it to a spray bottle.
You can use either apple cider vinegar or white vinegar.