A Reddit user asked about the small black dots on almost every car's windscreen - and it turns out they have a crucial ...

The little black dots on windscreens are always there, but many motorists are completely oblivious to their purpose ...

The small black dots around a car's windscreen are always there, but many drivers go years without noticing them or learning ...

Motorists have been left amazed after learning the true purpose of the small black dots around a car's windscreen that many ...