How Do I Remove the “other” In iPad Storage?

The “other” on my iPad 2 mini storage is larger than the colored section (apps, media, photos, etc). Above the graph it says I have about 5 GB free. Plugging it in to my computer, iTunes shows I have 10 GB free. Do I believe the iPad or iTunes?
Assuming the iPad is correct (I get full-up warnings) I have tried removing apps and sending photos to the cloud, even did a DFU but no change. Can it be removed?
Thanks.
—–
Bob Powell