I've got Xenons and my headlamp washers come on every time I clean the screen. Is this because of the Xenons perhaps?
In the UK it's a legal requirement for cars with Xenons to have headlamp washers - is this why they wash every time?
It does run down the screenwash really quick at this time of year, although I think cars with headlamp washers have a slightly larger screenwash tank.