From the album Your Favorite Toy
This is about mistaking observation for rescue. The narrator projects salvation onto someone who is literally just doing their job and will leave when the work is done. The window cleaner becomes a stand-in for hope the speaker has no reason to believe in.
Lately I don't hear a sound / I'm a puddle on the ground
The progression from silence to total physical collapse sets up what comes next. A puddle can't look up at anything, but the narrator somehow sees someone in a window anyway. The spatial logic breaks on purpose.
You were a window cleaner letting in the sun
Window cleaner. Not a metaphor, an actual job description. The narrator knows this person is performing a task that will end, yet still frames them as salvation. That gap between what they know and what they need is the whole song.
Pleased to finally meet you / Until someone lets you down
They are not meeting. The window cleaner never speaks or acknowledges the narrator exists. 'Pleased to finally meet you' is something the narrator says to themselves while watching a stranger work. The letdown is already built into the setup.
Letting in the sun, man that looks like fun
Not 'that must feel good' or 'I need that.' Just 'looks like fun.' The narrator stays outside the experience even in their own fantasy. They are watching someone else let light in, not asking for any themselves.
The narrator builds a story around someone who will never know they were in it. What reads like hope is actually the awareness that hope is temporary and one-sided, dressed up as a love song to a person doing manual labor. The sun comes in, the job ends, the puddle stays on the ground.