Costco - Flents Wipe'nClear
I got these wipes for my glass and plastic lenses and they have not hurt my Droid. I got a big box of individually wrapped wipes at Costco. I've found it best to lightly blow on the screen immediately after wiping to more quickly evaporate the moisture so spots and streaks aren't left.
Biodegradable Lens Wipe
"Cleaner for the environment!"
Ingredients: Water, Isopropyl Alchohol, Detergent and Anti Static.
BTW, wipes with alchohol are not recomended for devices with anti-glare coating.
P.S. Why advertise a little wipe as biodegradable and distribute them in individual paper/plastic/foil envelopes that obviously aren't.