Doug went to the floor and used a rope to pull the instrument air line etc. more from the oplev pyron and the 10-min oscillation is gone.

alog from yesterday: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=16276

This is yet another temporary fix that is good enough for a while, just like the original "fix" which stayed until today. This sounds like a good target for the detector group to keep track of.