> notorious for being basically un-cleanable

I don't really think anyone other than OCD/germaphobes thinks about toilet paper rolls in that way and it's certainly not "notorious". I'm pretty sure the general sentiment is that it's a perfectly benign material, often given to kids to play and craft with.

The same thing happened with that episode of mythbusters about the toilet ploom from flushing. A bunch of OCD/germaphobes lost their minds and have not stopped thinking about it since. Meanwhile the rest of society gave a collective shrug and couldn't even be bothered to move their toothbrush brush to another room or close the toilet lid while flushing.