Firstly, is this:
okay to clean the lens with? Or should I use lens tissue? It comes with the Nikon's cleaning kit so I'm guessing it's a microfiber cloth, but I'm not too sure.
Secondly, for the body, is it okay to use a normal rag (wet with tap water) or should I use the type of cloths that come with your spectacles when you buy spectacles? Those very soft types? Are those microfiber as well?
For both questions, do you need to wash the cloth after each wipe? How to wash? Throw in washing machine can or not?