"Permanent" streaks on screen

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http://forums.androidcentral.com – I've had my nexus 7 for about 2 weeks and have been noticing a couple of streaks running across the length of the screen. I've tried using a cleaner (Monster iClean) and a microfiber cloth, but the same two streaks keep reappearing. There is nothing tactile about them - the look and feel like surface smudges. The only time they are noticeable is when I'm in an app with a darker solid background, but they are very irritating. Has anyone else experienced this? I fully realize that this screen is very prone to smudges and I'm fine with that. I've been using iClean to maintain tablet and phone (HowTos)