Did you put the right surface of your diffuse glass facing outside?
 
As we all know that the 2 sides of diffuse glass is different, one side is smooth and the other side is relatively rough.
 
So which side should face outside and which inside when glazing? The answer is to put smooth side outside and rough side inside.
 
One advantage is easy cleaning. No matter there is dust, birds droppings or tiny granule, all can be cleaned easier than rough side. Besides that, the glass performs a better impact resistance, and glass is less likely to be destroyed when encountering bad weather like big snow and hailstone.
 
There won’t be condensation dripping on rough side thanks to the pattern of diffuse glass, instead, it will form water film on the surface thus won’t hurt your crops if rough side faces crops.
 
Believe you have learned the reasons, so did you install your glass correctly?