icarus wrote:

Hi folk,

I have two greenhouses that are covered in algae and dirt at my new house.
Is a pressure washer going to be too harsh to clean the glass ?

Anyone with experience please ?

tia,

cheers

Depends to some extent on how powerful the pressure washer. A powerful
one will remove cement from between bricks and slabs, so I reckon if you
angle it the glass would flirt out. However can you not adjust to a fan
spray?