Regarding the cards' backs showing a little wear.

I figured this was the best place to put this question, since it pertains to the Druidcraft deck, but it's obviously not a study group. If it's not the appropriate place, please move it.

I keep my deck in a velvet bag I made, but I've noticed little white flecks on the backs of the cards. I don't shuffle the cards; I swish/mix them around until it feels right. What can I do to prevent this kind of further wear on the cards? It is such a nice deck, and I'd like to keep it in the best condition possible.

My deck has these white specks now, too and I am so happy about it. The cards are finally looking a little worn and well loved. This is my favorite deck of all times, so I want it to look well loved.

Apart from not using the cards, I don't know what can be done to keep them in the best condition possible