Betsy and I finished cleaning the ~30 optics I have in hand right now for assembling the TRANSMON table.
Few more optics are coming next week.

After a couple of trials, and with the help of Margot who was on site this week, we think we converged on a good practical procedure (ref: E000007-v2):

- Do the cleaning in the bonding lab (nice and clean), not the optics lab
- The sequence is: liquinox, DI water, methanol, nitrogen blow-off, but the important point is to make sure that your gloves are clean each time, as we
noticed that gloves are really the main cause of contamination (DI water on gloves when doing methanol, etc). With 2 people is easy, as one person can do the liquinox + DI water, and the other one can do methanol + nitrogen. For one person alone, the best strategy we found today is the following: do liquinox + DI water + methanol for all the optics with the same gloves, than change gloves and repeat methanol + nitrogen blow-off if necessary
- Use a lot of DI water (more than 30 seconds) and get rid of liquinox on your gloves too
- At the end, if there are some particles or streaks left on the optics, wipe with methanol (rarely needed)

We also tested first contact on a small 1" optic. 
Before I left, I put a couple of clean old REO mirrors (2" HR1064) in the new Empire West clean boxes I bought (I wiped the boxes first).
I will take a look next week to see if they are still clean.

I left all the optics in the bonding lab (see pictures). As not all these optics are scribed (some are borrowed from iLIGO ISC and squeezing), it would be helpful if they could remain as I left them, so I can keep track. 

In case you need to use that bench, please let me know.