I would do as the others said, and take notes. Also, as time goes by, it is possible you have gained actual body weight, could be time to adjust your dry weight. Another factor would be your BP meds, such as when you take them, or dosages. Like you said, it is a sticky situation as Nurses and Techs tend to stick together, you surely don't want to be known as a "problem patient", thats an uncomfortable position to be in. IMO, dialysis is NOT an exact science, different factors could be at play when crashing out.