1. Alcohol is the choice to clean the plates.
Peroxide has too much water and too much water can ruin the plates.
2. 90% alcohol. Be sure not to touch the edge as the PCB (fiberglass) will soak up liquid and bloom (expand).
3. I’ve used aloe Vera hand sanitizers before since it was all I had. It worked I just made sure to use a little distilled water to wipe it off right after. Then dry.
4. I use wet wipes then alcohol.
5. You can use ozone / ozonated water to clean Spooky2 Sample Digitizer.
For more details, please check the link: