or you just use it more than you think

I thought the same thing myself. Its 7.8L if I recall. I said theres no way to using that in a such a short time. I checked for leaks, nothing. Then I had a buddy spray 'em when I was outside. It fires like crazy. You've got 6 jets on the front. I concluded saying 'oh well' as washer fluid is very cheap and I always have clean headlights.

I only wish the headlight sprayers were separate from the windshield, as I sometimes pull the lever multiple times to rid myself of the thick Minnesota ice