I cannot recommend myself thoroughly.
As fallout of that Sars-CoV2 thing Honeywell has conducted a study on various antiviral cleaning solutions. Can't post links so google for "SIL D202004000758".
Some of these come handy as a cleaning agent as well.
Amazingly they found out that 90% Isopropyl Alcohol is perfectly safe to use ... which is what optical technicians have been using for decades. Preferably on Kimtech Wipes.
I know aviation likes to reinvent the wheel. But doing what has been done in professional optics and camera techincs is no fault:
Clean only if necessary, as most wear ist mechanical
But definetly clean if necessary, as dirt and dust captured by organic residues will act abrasive.
Blow of first or use a brush made of badger hair.
Use soft and lint-free cloth (Kimtech wipes) and Isopropyl Alcohol as cleaning agent.
Btw.: According to the safety data sheet ALG/CR215 contains Isopropyl Alcohol and Dipropylenglycol Methyl Ether.