When twitch a pb clean?

How do you do that because I do not think that's xD

What do you mean by "pb"?

Hmm, maybe you mean "pb" "profile picture" or "profile banner"?
You can change both in your profile settings on Twitch:

https://www.twitch.tv/...gs/profile

If you mean something else, you might want to write what you mean instead of using any cryptic shortcuts.