What color is the stain? I've experienced defects in salted prints because the paper hadn't fully dried in one spot compared to an adjacent area. One part would be blue-gray and the other part maroon-gray. I started drying the paper longer before printing on it and that problem went away.
The stain is brownish and usually in the left side. It's in the same shape as the puddle. It intensifies when I wash the print.
“We are buried beneath the weight of information, which is being confused with knowledge; quantity is being confused with abundance and wealth with happiness.
We are monkeys with money and guns.”