[dilap]

i had this happen on a macbook i used some weird cleaning agent on the screen with; this was maybe 3 or 4 macbook's ago -- since then i'm really picky about what i use to clean the screen, and i haven't had the problem.

obviously it's not definitive, but i suspect cleaning products may be to blame, or blame in a large number of cases.

edit: knock on wood.

[JustSomeNobody]

Having worked my way through an engineering degree as a lab manager for an optical lab, this looks like what happens to an A/R (anti-reflective) coating when harsh cleaning chemicals are used (Windex, etc...).

On mine, I would just use a water-dampened, clean, soft towel if I need to clean my screen. And by clean towel, I mean clean. I don't even set it on the counter as it can pick up particulate matter. And by soft, I mean never a paper towel. Ever.

[zk00006]

Yes this is what Apple says. The fact is that all screens have serious structured patterns imprinted from the keys - independent on the cleaning method.

[pdiddy]

When you say picky what do you use? Shouldn't you just use water?

[dilap]

Yeah, mostly just water. My (now ex) officemate had something else he was using for a while without problems, so I used that sometimes, too.