One ihip earbud won't charge. How do I fix it?

So I got some new ihip earbuds (right out of the box, mind you. This is my first time using them) and immediately one of the earbuds won't charge or turn on at all. The other earbud is charging fine, and the case is charging. I don't think it's dirt or anything because I just took them out of the box.
I've tried taking the earbud out and putting it back in the case, or adjusting how it's sitting, and it'll charge for a moment and then the light will turn blue instead of red. It won't play any audio or connect to my phone, unlike the other earbud that works perfectly.

Is there a way to fix this?