Nose rubbing

As part of his nightly routine my little one likes to test how escape-proof is tank is (screen top) I am starting to worry that he is going to hurt his nose. I have read that they will do this and it can cause their nose to become raw. Aside from using something other than screen is there a good way to prevent this?

I'm going to assume he can only reach the edges of the screen, so maybe cover the border edges of the screen w/ a solid material. (paper, cloth, cardboard, etc). Balls can still rub their noses raw w/ any kind of surface, but at least the screen can't be a cheese grater. lol...

Ah good idea! He does manage to hold himself up and get to the middle sometimes, but covering the edges with fabric should work :)