how often do you need to fill your windshield washer fluid? honestly, i don't even use mine at all. i guess if you need to fill it every month ...

 

Funnel FTW.

 

You are in CA... people like me in the Midwest who are not in CA get snow one part of the year and the other part rain all the time.. I go through several bottles of washer fluids in the winter because the salt just leaves a white residue on the windshield that prevents you from seeing through it... And during the non-winter months the rain leaves dust and sand particles on the windshield making it annoying to look through the windshield. Not to mention all the construction dust that gets on the windshield

 

If you're careful, you can empty all but the last 5% of a washer fluid bottle without spilling a drop.

for that last 5%, I find that crushing the bottle enough so I can get it vertical enough to get the last bit out works wonders :P