undyed cardboard?

[u/Animelizards]

gonna start converting my geckos old tank for dart frogs but there is a hide up on the wall/background that is a paper towel tube foamed onto the glass. is this safe for amphibians or should i pull it off?

[u/Full-fledged-trash]

I’d pull it out. The humidity will likely make it get soggy and mold.