I investigated o5464g0335o chip 04 cell 43, which had bathtub rings present. I decided to go backwards in time, until I found what caused the rings. What I ran into was a bunch of exposures with bathtub rings, then an exposure with a video cell (o5464g0322o), then the exposure before that had no bathtub rings. I investigated a few other random cells on the same night on chip04, and the same thing happened: the bathtub rings occured after the video cells (not before), and lasted for a long time afterwards (I did not check for how long, but for the first example, at least until I ran into the stare observations, so until about o5464g0361o)

I then started from the beginning of the night, with the first video cell:

o5464g0020d xy11 - no bathtub rings o5464g0021o xy11 -first video cell o5464g0022o xy11 has bathtubrings (nearby cells are fine) -xy04 is fine o5464g0023o xy11 has bathtubrings - xy04 (video cell) -xy62 is fine o5464g0024o xy11, xy04 have bathtubrings -xy62 (video cell) -xy52 is fine o5464g0025q xy11, xy04, xy62 (bathtubrings) xy52 (video cell)

Then I got tired of looking at the datastore :)

bathtub rings from o5464g0335o chip04 cell 43

bathtub rings from o5464g0022o chip04 cell 11