10gb of "other"

Hello,

I have an iPhone 5, 32gb, that contains just over 10gb of "other." I actually had this problem with my iPhone 3GS before I upgraded, and thought it might disappear on it's own once I upgraded. Unfortunately that wasn't the case.

Here's what I've tried:

*Restore from backup
* Uncheck music & sync to delete music (the "other" stays the same)
* Settings>General>Usage>Music, swipe right on Music, then delete

Any advice on how I can reclaim my space?

Thanks in advance,

-Feller