On 03/07/2019 19:39, Andy Burns wrote:
Steve Walker wrote:

Back in the '70s my father used a Retrovisor when towing the caravan.
It was attched to the car by suckers on the roof and the windscreen.
It stayed on a lot better with a smear of gelatine instead of just
wetting the suckers.

These days a silicone oil would probably do the job.

And give you a smeary windscreen forever after ...

But only in the corner where you stick the Satnav anyway.

SteveW