Guiding disaster

Psy1280

Started imaging the Pacman Nebula last night. For the first four hours, my guiding was fine (i.e., 0.5 – 0.8).
At one point after four successful hours into the plan that I set up…using a 3nm Sii filter, I noticed star trails and watched as the guiding deteriorated (i.e., > 17.0 and rising). Star trails in each 5-minute sub getting worse and worse.
Multiple stars were circled in the star detection window. I was using an OAG and the stars were in focus.
I tried the following:
Looping, calibrating, etc. Nothing helped
Checked all cables, no snags.
Shut down ASIAIR Plus and re-initiated the plan
Shut down ASIAIR, and returned the mount to ‘home.’ Re-started ASIAIR, re-did Polar Align (plate solved, focused, etc.) re-made a plan, and initiated the plan. Guiding continued to be extreme.
Updated firmware and re-started the entire process and Plan…nothing helped.
[FYI: perfectly clear night—no clouds, target was 54 degrees high when I terminated the session]
I’ve been successfully using my AM5 mount with my ASIAIR Plus for over a year and this has never happened. I’m hoping someone has some insight as to what might have happened.

Hara

Fog/dew in the lens of guide scope?

Psy1280

Don't think so, this is an OAG and is encased in the tube.

Psy1280

Since nothing has changed in my setup and procedure, I'm fearful that trying again will only produce the same problems, but I have to find out.

Corsair

Sounds like something became loose or was loose.

Psy1280

I checked everything, nothing lose. I think it may have to do with my shutting everything down but not turning off the mount in order to reset it. Hopefully, I'll get to check more tonight.

Psy1280

Just started again tonight...still same problem. Guiding is now 60.55!!! Interesting, it was guiding for a short while but "only" in RA. The Dec line on the graph doesn't even show up.

Corsair

The initial setup went fine? I.e.
tripod pointing to True North/ South and levelled,
gear all balanced and in Home position before turning on ASIAIR,
logging into ASIAIR and checking settings correct
turning on mount and/or enabling mount,
turning on camera and cooling and waiting for it to settle
good enough focus of main camera
PA,
return mount to Home (mount settings > Go Home)
Sync (mount settings > Sync)
go to star
Refine focus of main camera
Focus guide camera
Ensure any bahtinov mask removed
Return mount to Home

Then start tracking target
Start guiding making sure to clear our any previous guiding data

Tech@ZWO

Corsair Could you share the PHD log here?
And take a picture of your devices connection, thanks.

Corsair

Tech@ZWO

Sorry. My post was meant to be a reply to @Psy1280 . They are the one that is having the issue.