the polyether is good?

hi, i bought a polyether cloth, but i don´t know if is good to clean the screen of my devices, in the store where i bought the cloth they say that is good to clean screens, but i hear that the polyether can scratch the screens.
is like this.

puma1552 said:

looks like microfiber, maybe the same thing

definitely for cars

Click to expand...

this is the cloth http://www.evriholder.com/Fuzzy-Fingers.asp
says that is microfiber, but in the label says polyether.