Yes it is just pressure washing - I just cannot use chemicals on these works.
To get their use past the principal contractor & then Tesco just wouldn't happen.
I think in the last 12 years I've probably only used chemical no more than 5 times, this being one of them -
This is hand cleaning to a Tesco carwash glass partition - covered in deposits from the water over the years.
There was a lot of it, we had to clean both sides and it took forever but the results took it from opaque to clear.
There is a piece of glass in the main section you are looking through. They were all like the piece to the right of the picture.