[Thin Lizzy]

Actually, if you're writing blogs or checking social media, keep the light on and the minute he starts chewing the cage, turn your back on him - this way he'll see you and that you're ignoring him, he'll get fed up and stop.
You could try putting cardboard from toilet rolls between the bars that he chews. This worked for me also as mine didn't like pulling the cardboard.
Mine only chewed the bars in a certain area of their cages!