How often should you fill windshield washer fluid?

when i need it or at every 3 monthHow often should you fill windshield washer fluid?
i guess it depends on how much you use it, my car is almost


2 and i haven't filled it. actually i never even popped the hood.


lol :)How often should you fill windshield washer fluid?
Depending on how much you use it. If they top it off with oil changes, it may never run out. If not I think about 6 months. Up North you probably need more of it with the snowy winters.
Generally it will last a long while. It depends on how often you use it. If your not running out fill every 3,000mi. when you get your oil changed.
Whenever you run out.