Why is my iPhone 5s home button making a weird noise?

I know that its a button and that its supposed to click, and it did in the beginning. My phone is less than 4 months old, and recently when pushing the button it makes a cracking or crunching noise. Even if I just push down lightly, like to use the finger scanner it makes the crunching/cracking noise?

I know it didn't make this noise in the beginning? Is this normal?

Thanks!

Added (1). Apple always has a 1 year warranty right? So, would my phone still be covered?

See, now it's moments like this that I look at my Nokia flip-phone, and I smile.

These problems are common if you give it to where you bought it ( if your warranty is still up) you will be granted a brand new iPhone. Happened to me.

Never happened to me. Just bring it to the Apple shop. They will check. Good thing about Apple is you can replace it with a new one if your warranty is still up!

If it works fine then I wouldn't worry about it.

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