Use the regular dish washing soap, not the one for hands (it might leave a residue). I'd wash it in clean benzine (Homedepot, Ace...) instead to remove the old oil too which could trap water, salt, perhaps sand. But that's not really so crucial.
Hair drier works good for drying too (just watch plastic inserts, if any, for melting). Oil it immediately while not completely cooled down. Make sure to dry out your nylon sheath too.