The test over the weekend of turning off the cleanroom after running the ALS alignment servos for a while is kind of inconclusive.  the attached plot shows PZT outputs over the weekend.  The red arrow indicates the time when the cleanroom was turned off, you can see a small blip in the alignment servos, but it is small compared to the normal drift in the servos.  However, the plots attached to alog https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=7146 show similar drifts in the PZT aligment, even before the cleanroom was turned off.

One problem with the test we just did is that the green wasn't on the PD when we started, we can try this again after realigning if we need to.