my $ua  = LWP::UserAgent->new;
my $jar = $ua->cookie_jar({ 
  file           => $full_path_to_script_dir."/cookies", 
  hide_cookie2   => 1, 
  autosave       => 1, 
  ignore_discard => 1});

#... do surfing....

#edit jar
$jar->clear_temporary_cookies