>>3259190Well, maybe they are harmless, i'm obviously not buying and testing them. If they are paper based, you can bet they are abrasive, so a towel will be always a better option. Still, pointless product designed for maximum profit. Wet weather, you need dry towel. Travelling, you need portability. Total cleaning, you can do with a dedicated kit. Environment awareness, you stay away. Costs, you stay away.
Just use quality microfibre cleaning cloth, they're designed for the job, are washable and handy in all circumstances. Have shaving brush ready when expecting dust, and only ever use water in the field. Chemicals can actually attract dust, so use them only at home when having enough time to dry everything. Ideally heavily diluted. What's most important, clean sparingly. Small specks of dust, will always be invisible on final picture. Lenses are hardy, so don't overthink things with them. Modern coatings as well, they're no longer a thing you could easily scratch away. Sensors are a different thing altogether.