Following up on the DetChar report of ETMx oplev laser glitching causing problems, I confirmed (using the DetChar summary pages) that the laser was indeed showing signs of glitching.  I also noticed the ETMy laser was also showing signs of glitching.  I increased the power for both lasers to hopefully get them into a thermal state they are happy with.  I used the Current Monitor (outputs a voltage to monitor the current delivered to the laser diode) port on the back of each laser as a guide.  The changes were:

• ETMx
  • Current Monitor Before: 0.814 V
  • Current Monitor After: 0.830 V
• ETMy
  • Current Monitor Before: 0.861 V
  • Current Monitor After: 0.880 V

Seeing as I had to open the cooler for both lasers they will both need 4-6 hours to return to thermal equilibrium.  At that point a determination can be made as to whether or not this helped at all.  The attached 3 hour trend of the oplev SUM for both optical levers gives hope; after the power increase the SUM signal is quieter for both oplevs.  I will leave WP 6348 open for now as more adjustment may be necessary to fix the glitching.