In this method, you would to use a single disc rotary terminal.
Having your carpet cleaned in house leaves it moist and coated in soap deposit. Over time these things can work their way deep into the square area rug. I believe this is as there is no EPA registered disinfectant for carpet. http://Bwxtmd.net/__media__/js/netsoltrademark.php?d=ttp%2F%2FLadder2leader.com%252Fpractical-uses-of-your-wet-dry-vac-in-carpet-cleaning%252F%2F