Tree Reb
TreeHouser
When dull I dip it in Apple cider vinegar and blow dry after 3-5 min.
I do that with my hair but don't blow dry it anymore.
As for files I use a brass brush to clean them.
Chains, in a vise at home or work mounted on a stump. Both hands on file, chain tight. File one side then go around and file other side. I've tried other ways, that's the only way for me. Only touchup filing is on climbing saws, the rest get knocked around a bit.