[Tech] Xbox One Controller RB button issue?

Hi,

I live in australia, I got an xbox one at home about 12 months ago. I got an extra COD AW controller with the xbox, and 7 months in the rb button stopped working, it won't even click, it's stuck.

So the other controller from before is now having the RB button stop partially working. I can still click it unlike the other controller. Sometimes it would work sometimes it wouldn't. I have to blow into the rb button and sometimes it will work and sometimes it won't.

Could somebody please help me?