Best way to handle ignored Rel=Canonical?

[GalcoIndustrial]

My Google Analytics is reporting organic traffic for URL's with a QueryString attached, even though there's a Canonical tag that points to the preferred (non-QueryStringed) version.

Would the best way to handle this be the GWT URL Parameters Tool?  I'm fairly unfamiliar with the tool, but after some research, it looks like this might be the best way to go.  Does anyone have any good/bad advice for using the tool?

Thanks!

[GalcoIndustrial]

Thanks for getting back to me, Oleg.  I think I understand what you're saying, but my question is still: Why would Google ignore the rel=canonical and serve up search results for the QueryString version of the URL? Analytics is showing that the hits to this URL are from an Organic origin.

Not sure what to make of it.

[OlegKorneitchouk]

If you have a canonical set, you don't need to worry about any parameter handling. Analytics will still display the full URL (with the query string) because it doesn't look at the canonical url.