It doesn't matter what cleaner or cloth you use unless you blow the dust particles off first. Otherwise the cloth will drag the dust along the perspex and cause micromarring. Tiny little scratches that show up under bright light. We have all seen this on the piano black gloss bezel on monitors or TV's or the phat PS3 or gloss Xbox 360s. And the Xbox One and PS4 will be the same. It's the same on case windows, though harder to spot unless you have the light a certain way. This is why I gave up on windows ages ago. Eventually you will scratch it no matter what. I tried every micro fibre cloth going, and even had a dust brush made from ostrich feathers at one stage. For a while my side window was scratch free but all it takes is a couple of dust particles to be caught the wrong way and insta scratch. Of course you can always use plastic polish to get the scratches out and this works to a certain extent but generally leaves smaller micro scratches in it's place. You really need either an orbital or rotary buffer to do the job or it's very hard work. In the end I gave up and only have non-windowed panel's now.
However to answer the question. If you do insist on cleaning the window.
1. Blow off as much dust as possible (can of air).
2. Use a very soft microfiber cloth or lens cleaning cloth. Not the microfibers you get in supermarkets but something decent like a meguairs. I usually test how good a microfiber is by doing the CD test. Get a blank cd and wipe cd in straight line motions. Check under very bright light. If no microscratches the cloth is soft enough.
3. Now dampen the microfibre cloth. You want it damp for less friction and also to soften any dust particles you did not blow off which will hopefully now not scratch.
4. Wipe the panel with the cloth. Use either vertical or horizontal motions. This lessens the appearance of individual swirl marks/micro marring you will eventually get as the light reflects differently off a straight line rather then a curved scratch and the scratch is harder to notice as a result.
5. Either let dry naturally, or use a 2nd dry microfiber of same type to buff as it's possible the dampness could leave streaks/smudges
6. Test for microscratches with high powered halogen light after

Or not.