yeah that yoke looks very clean. You don't need to replace the glue if it's still stuck there. If it's peeled off, then you might want to consider it, but if not, leave it as is.
you really only need to wipe down the plastic parts with a rag and some isopropylphenol (good luck buying this during these COVID-19 days), and the wire-woundings only need to be hit with compressed air.