When using codeigniter do I need to clean the URL from XSS?

[eluser]gunnarflax[/eluser]
The title says it all. Do I need to clean the info I get from:

Code:

$this->uri->segment(3);

[eluser]C. Jiménez[/eluser]
http://ellislab.com/codeigniter/user-gui...urity.html

$this->security->xss_clean()

example:
$data = $this->security->xss_clean($this->uri->segment(3));