Put some white vinegar on the rag, and run this down the wiper blades twice. With another rag already wet with clean water, wipe the vinegar off the wiper blades.
See if that works.
Tester
Put some white vinegar on the rag, and run this down the wiper blades twice. With another rag already wet with clean water, wipe the vinegar off the wiper blades.
See if that works.
Tester