my iPhone 6, 16gb is almost full because of the "other" space, how can I get rid of it?
First of all, you should know exactly what is the "Other". Because there are just too many things that require physical storage in iPhone. That's why Apple chose to lump a lot of things into the "Other" category. If there is many "other" storage on your iPhone 6, it's seems like your phone is filled with cached files and data. That can include: 


Documents &amp; Data 
Safari browsing data 
Mail data 
iTunes data, including files that have been streamed (which can be BIG).


Deleting data, and then restoring is a good way, but you should back up first. or it will cause data lost. So it will take a little risk. Have you updated the application on your iPhone or upgraded iOS system to the newest version available? Some similar problems have been resolved using this way. If above ways still not work, you can choose some professional tools. You can try iMyfone Umate. It claims that this tool can optimize storage space and reduce the storage space occupied by apps to free up iPhone space. Maybe it's useful.