It does sound like you left some residue behind if it looks worse. ???
However CGD, unless it's completely trashed out or it's a locker room or daycare I'd encap it. Encap will look better for longer on CGD carpet.
Even in businesses where we need to HWE, we will encap it later to improve the overall appearance. It also solves the returning spill problem that you experience with CGD carpet.
Get with Jeremy Sweetland Encapstore.com or VacAway Products or
Excellent Supply or John Guerkink Carpet Care Systems these guys know Encap products and they can help you out.