Yeah pricing isn’t an issue. People understand that they are a pain.
It sounds as though you use a similar technique to me. I’ll open them, take the screen out and then wash 5-7 of them with the sorbo washer (depending on how dirty), then push the louvres so they are fully open and squeegee the underside of each while wiping my squeegee every time. I then tilt the louvres to a little more than 45 degrees and do the same to the outer side of the glass. Then with my bath towel mop up the edges and bottom of each panel then buff with a detailing cloth if needed.
It sounds time consuming but I can actually go fairly quickly. I think that’s probably the quickest way if using trad methods.
Has anyone wfp the exterior while they are closed and then buffed the inside with a detailing cloth using the residual moisture? I like the just use the pole as it would leave a horizontal line where the glass meets.