Narrow Gaps - What would you do?

I just quoted a job that has a fake balcony where the railing comes out a couple inches from the door. It’s narrow enough I can’t fit my arm in past my wrist, so a couple inches clearance.

I’m sure I can design and make a low profile squeegee to be able to clean it, but is there already something out there that will handle this?

I also have a WFP and just had the thought of using a spray bottle and a scrub brush. Wet the window with Dawn water, use my T-bar on a pole to scrub and then rinse with RODI water from my WFP?

Good morning, I know this post is old but I am in a similar situation and wanted to ask if you ever figured out the easiest way to get all the glass clean? Thank you in advance

I used a Moerman squeegee on a 3 ft pole. It took a long time and was hard to detail. If I were to do it again, I’d use a flatmop type tool with windex.

I must have spent 2-3 hours yesterday in a similar situation. I was pulling my hair out!
Sliding glass doors, with non removable sliding fly screens, that have a very slim glass balcony (4-5"). Some of the doors were fixed which caused the real issue. It was hard to keep any pressure on the mop on the pole and my Moerman Excelerator on 40 degrees still wasn’t enough angle. It was frustrating to say the least. I’d be interested to know what other solutions folk have found.