How useful are headlight wipers?

FYI I don't have wipers, spray only (it isn't a BMW, BTW, though that's
immaterial in this discussion, I think). I was replying to Deep, whose car
does not seem to have wipers either.

DAS
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For direct contact replace nospam with schmetterling
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"Bradburn Fentress" > wrote in message
...
>
[...]
>
> In most BMW's, over the last 8 years or so, the headlight spray is
> activated every 3rd time the windshield washer is activated, when your
> lights are on. It has minimal effect on your washer fluid levels. There is
> no way to manually spray the headlights (it only come on when you do the
> windshield, and then only when the lights are turned on) and the automatic
> spray last a couple seconds of intense burst. There is no great effect to
> washer fluid levels, and certainly if it is working correctly it doesn't
> drain the fluid "at an alarming rate".
[...]