New iPhone 5s issue? Dust in rear camera lens

Bought a new iPhone 5s from Apple retail store last month and been using it with love and great care.

However, few weeks ago I noticed a tiny dot of white dust/lint showing under the rear camera lens.

I do believe it is definitely trapped inside the lens since I tried many times wiping the rear camera lens with soft micro fibre cloth and all surface dirts cleaned and gone expect this one tiny dot still exist and perfectly staying on same spot…

I love Apple products but this issue let me down. This thing costs me a lot and I'm not happy using my new iPhone with a dust trapped on rear camera. What to do now? Take it back to Apple store and will they replace a new one? Well they better give a new one otherwise I demand full refund… FYI I live in Australia.

Please help and share any experiences or useful advices you may have.

Added (1). UPDATE! @fhotoace

Does the Apple One-Year Limited Warranty considered as under warranty when purchase apple hardware products? It's only been a month since I purchased it… http://www.apple.com/...-warranty/

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