On 14/01/2020 15:19, Dave Plowman (News) wrote:

Screen wash additives also seem to vary quite a bit. BMW seem to make
(sell) one of the best ones.


Often the problem is with machine car washes where the windscreen is
sprayed with wax as part of the final process. Screen wash additives
tend to work better once this wax is removed from the glass.

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