I'm using my Degritter as the final rinse/dryer in my cleaning chain, which starts with a vacuum RCM for debris removal/enzyme soak, a Kirmuss for IPA/water/surfactant cleaning and then Degritter. Note, I'm not using the Kirmuss Method - just using the Kirmuss machine.
I tend to wash in batches of 5 or 6 records, after which the water in the machines is too warm to continue.
Measuring with TDS meter I find that the Degritter water is always > 2ppm after that batch, and often higher, so I discard the water after every session to avoid rising chance of audible residue being left behind. The Kirmuss water will stay below 1ppm for a number of sessions after which I ditch it, so I drain that to bottles between sessions. I am probably being overly paranoid keeping with these low numbers but the water is very cheap to replace so why not?
A year or so ago I did a whole bunch of cleaning permutations including different surfactants and recorded the results for ABX testing on my computer to determine my best cleaning method (which Neil had quite some input too over on another forum).