What is the best window cleaner for sliding glass doors?

No sun. Any good cleaner. I wipe cleaner off with old cotton and polish with either newspaper or microfiber cloth.

Inside I wipe vertical, outside horizontal so I know where I messed up.

https://www.youtube.com/watch?v=XlmyCWy4IKE

I just learned this recently: those white sponges like Mr. Clean except I use the ones from the dollar store. (You get 2 for $1.00). I had a large sticker on my car window and with a little bit of water rung out from the sponge and circular motion it came right off. But I noticed it left no streaks etc. I did the rest of my car Windows and they have never been so clean.

Vinegar and water in a spray bottle and wipe clean with newspaper for zero streaks. It really works and if you don't like the vinegar smell you can add some citrus to it like lemon.

I use coffee filters, they don’t streak, and no ink to worry about.

You can use a commercial product and that works well-such as Windex or a natural cleaner-vinegar and water. I apply it with a microfiber cloth attached to a squeegee and then remove it with the blade side of the squeegee.

If you don't have a squeegee, apply with a microfiber cloth and remove with an old windshield wiper.

I have never had good luck using newspapers, always a streak or smudge I would chase around.

Oh, do this when the sun is low.