Oh gee hamster history here, this starts from Pophammy time....there were others who I cant remember before this...
Buffy - barred cage, never chewed no problems
Lucy - barred cage. never chewed, no problems
Lily - barred cage, never chewed, no problems
Barley - larger barred cage, chewed occasionally, no damage to self but stopped after she had a litter for some reason. No damage to face
Peppermint - Gabber rex cage - sometimes chewed roof of cage with slight fur rub. Stopped with tiles on top.
Runty - same as above.
Nelson - Gabber rex cage - chews and acrobats when female in season but not persistant. No fur rub and no tiles needed.
Bailey - Gabber rex - never chewed no problems
Pawaver - Gabber rex - chews roof bars when girls in season. Has slight nose rub sometimes. Fixed with tiles on roof.
Sonni - Started in bar cages. Moved because she could escape from them. Never chewed. Now in Gabber lux with no chewing problems.
Red - started in barred cage- chewed badly and rubbed nose to extent of bleeding. Was moved into tank cage which was a bit too small then to a Gabber rex. Never chewed since moved to tank cages.
It seems that not always a chewer if they start as Red has proved. They need a reason to chew I think, like to get to a female or to get out if fed up. To solve the problem most need to be moved to a non chewable tank and even then some will chew the water bottle spout or an alternatve. I think they actually enjoy it even if it hurts their nose. Perhaps it is addictive like smoking!!!!