Need to check if there are any electrical systems close to the inside glass, if so wfp
will be no use on the inside wet environment or not.
Even if they are close to the side of the glass they could still get wet.
Also it looks like a loading bay which means the glass will be dirtied by exhaust pollutants which
can be a nightmare to remove with pure water alone.
Got caught out on something similar a few years back.