MADVIU :
If it's a laptop, you can close your browser window and reopen it to the chat and see if that works. It has worked for me in the past. You could also restart your machine to try and fix it.
is a desktop and i dont know how to open and clean the pc , well cause i'm afraid of [b
[CENSORED][/b] it up xD. and i already tried that up , didn't worked.