windshield wipers squeak and they are not that old or cheap. Is there something to put on them?
Wash the wipers deeply, not casually, with alcohol. It won't harm them like WD40 will. If that doesn't work try a cloth soaked in gasoline and rub them well with that - use rubber gloves and don't smoke! If none of that works try washing your windshield with baking soda and water, wipe that off well, then try windex or vinegar too. I do not recommend WD-40 as it can leave a bad residue on your windshield and break down the rubber of the wipers.
mix a 1/2 cup of dish soap with a bottle of washer fluid and it really helps
before you replace a new set of wiperblades, clean the windshield and then apply windshield treatment. this will make the glass smooth which eliminate the noise
