Coffee Soda spills on Commercial Carpet can sometimes reappear the next day. Even when using VLM.
If there are spills on Commercial Carpet, I tell customers about wicking before I start cleaning, and tell them to call me if stains reappear.
I just go back spread some Adsorb Ultra on the stain (No Prespray No Water) scrub it in thoroughly with a CRB, and then vacuum up.
Easy solution for a frustrating problem.