'other' bar taking up too much space on iphone

ok i've seen this brought up a lot on here so it's definitely happened to other people, where the 'other' bar that shows up on itunes when it shows what's taking up space on your phone takes up way too much space. my phone has 8GB of space (which is apparently only 6.34GB). my audio files are only taking up 2.66GB. i don't have any apps on my phone because i thought if i deleted them it might do something but it didn't, and i can't download any more. i can't use the camera at all. the other bar is taking up 3.66GB of space on my phone and i have no idea what to do. i've searched online for like 2 weeks trying to find a way to get rid of it but it's still there. i already tried restoring it and it didn't do anything. i tried the 'phone clean' thing and it didn't do anything. i saw this comment on a discussion on here that said to go into advanced settings under the safari settings and delete all the web history and i did that and i thought it fixed it but it didn't. i'm still looking up things that could work but i honestly have no idea what to try anymore. is there anything i can do to get rid of it ??