Exclamation [Q] Dust under front camera

I bought this device less than a month ago, it is great and I love it, except for one thing, which is dust under the front camera. It doesn't affect pictures and is not visible except under the sun. Isn't this device supposed to be dust resistant?
Has anyone else got the same issue?
BTW, I used to have HTC Amaze before, and never had dust under the camera even though it was not dust-resistant.