Some people manage to stop bar chewers, but in my experience, it's merely a distraction before they inevitably begin chewing once again. The only way to really stop bar chewing is to block off the bars or switch to a barless cage. Is there any way you could zip tie thick cardboard or plexiglass to the sides? This will stop the chewing permanently. As Lil is young, this is likely "young hamster syndrome" and will be grown out of as they get older. However, if he doesn't seem to grow out of it several months from now, the issue may have to do with his cage or setup. Best wishes