First, before starting, choose a time when the sun is not at its strongest, like the morning or end of the day for example, because otherwise, your windows will remain marked. Also, to avoid stains, it is always better to use lukewarm water.
White vinegar, an effective cleaner
Perhaps you already know the virtues of vinegar? It is indeed a very effective cleaner, non-polluting, which can even remove insects and spiders! Mix 4 liters of water with 1 liter of vinegar and you’re done!
Clean your windows with newspaper
Mix a little water with lemon juice, dip in a ball of newspaper and rub your windows. Then wipe with a dry newspaper ball. A nice way to reuse your old newspapers and get flawless result!
No need to spend money on cleaning products in order to get good results!