My 2 cents....
oilcoholic: Do you mean to clean glass with or without the use of a cleaner? Interior or exterior?
I've been able to do a pretty good job of interior cleaning with any dry microfiber cloth. If you're talking about wet interior cleaning I don't see why the cloth is important in any way.
For exterior I've used various combinations of #0000 steel wool, Auto Glym and other glass polishes, or just scrub during a hand wash of the car with the wash mitt. Which method depends on what's on the glass.
jaj: An interesting point about glass cleaners. I usually use Bon Ami Power Foam (
link) I have found it to give the best clean with no streaking. I use about 1.5 sheets of paper toweling for the entire interior window surface and it can last months without regrunging. I've found that driving with the windows open re-grunges far more quickly than with them closed. You've made an interesting point about waxes, but I'm not sure the window up/down observations support a wax ingredient simply breaking down over time.
I use so little paper towel I don't worry about the cost, nor any kind of environmental footprint at just a couple of sheets per month for this task. In our area, paper toweling goes into the compost waste anyways.
I'm a non-smoker and my current car is 12 years old so there isn't a lot of vinyl off-gassing taking place. Off-gassing of car components seems to be a big source of the grunge. It can also be affected by what your interior dressing is. I've used Meguiar's #40 until I ran out this year and decided to use up my 303.
oilholic: Bottom line - if you feel you need a special towel, maybe you should change something else about the way you do things. I observed long ago that most foaming glass cleaners do their real cleaning when the glass is virtually dry and the towel gets hard to push around the glass. That's when you really need to press firmly and wipe every square inch until clean. It's a little bit of elbow grease but no special equipment required. I've never felt that any other kind of expensive towel would make this job easier. In fact it might make it harder. A low-texture surface (like paper towel or newspaper) at this stage is probably the most effective.