atomising washer jets and washer fluid

[nigeldodd]

Thanks. I am now puzzled, having resorted to the manual, that it distinctly says do not use distilled water but use tap water instead to dilute the concentrated screen wash.

I can't understand this.

[Watts]

Just dilute with tap water, as I've said before, it's not caused any bother with any car of mine ever nor even the fan jets over the last 15 years.

[SRGTD]

Just dilute with tap water, as I've said before, it's not caused any bother with any car of mine ever nor even the fan jets over the last 15 years.

Screen wash concentrate diluted with the very hard water in Norfolk has never caused any issues with my washers either in over 40 years of car ownership.

[itavaltalainen]

I can't understand this.

Most likely to do with salt content - majority of detergents required some in the water to work best.

Dishwashers use it to aid rinsing (and to soften water).