iRule redirect with cookie removal

To add to what Stephan said, when we do things like this on a redirect, here's what my iRule generally looks like the following. Like Stephan said, you'll need to make sure you're removing the cookie with at right path (and at the right domain if you're setting domain level cookies anywhere)

when HTTP_REQUEST {    
     ... prior code
   HTTP::respond 302 Location "Redirect URL" "Set-Cookie" "CookieName=deleted; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT"
   return
}