An optometrist-related friend claims that dishsoap+water will damage the coatings, and that one should use a microfiber cloth instead.

I'm getting a new pair of glasses soon; I intend to clean one lens with dishsoap+water, and the other with a microfiber cloth. Around 2024-01-01, I will:

1. not-clean my glasses for a few days, to let them accumulate grime

2. find a friend who doesn't know about this experiment

3. hand them my glasses, ask them if they notice anything interesting

   • if "yes, [soap lens] looks worse": resolve YES

   • else if "yes, [microfiber lens] looks worse": resolve NO

4. ask them if they notice any difference between the lenses

   • if "yes, [soap lens] looks worse": resolve PROB(50%) (or lower if they sound tentative)

   • else if "yes, [microfiber lens] looks worse": resolve NO

5. ask them if they notice one lense looking worse

   • if "yes, [soap lens] looks worse": resolve PROB(20%) (or lower if they sound tentative)

   • else: resolve NO

Details about my glasses:

• They came from Zenni Optical, with the default coatings (anti-scratch and UV protection).

• I clean them 1-2x/wk. (So, 10-20x before this market resolves.)