[Carlos67]

Yep, happens to me too. It's a P.I.A. especially at night when it shows all the fog and smear more clearly. Drives me mad. And cleaning the inside of the windscreen has always been a ballache job. You need to be a contortionist ?

 

[Carlos67]

You’ve all just summed up everything I was going to write! Greasy windshield a day or so after cleaning. I’ve changed the brand of windscreen wash I use, I’ve diluted more, I’ve diluted less and still it’s the same. Perhaps it might be down to the wiper blades?

As far as I'm aware, this thread is talking about the inside of the windscreen, not the outside.