A day before I have ran my pump with vinegar, I usually rinse the vinegar out of the line but for some reason some left in my line. At the first job the next day here I am ready to extract, I started right at the register area, the very first thing that came out of my wand is the last of the vinegar which was left. It left a yellow/brown line on the carpet, I try to remove it using a normal stain remover and it did improve, how ever it dried a little more darker color when it dried, and today the customer called me to notify me about the stain. She is an oldie and has no technology to take a pic of the stain but this happened from that vinegar sat in my line over night. I will go back to remove the stain, what do I need to use? dry cleaner? high ph prespray since it is an acid?