This may sound like a dumb question, but here goes.  I've been using
Essilor's lens cleaning cloth on my Crizal lenses like the optician
recommended.  However, after a couple of months, all they do is spread
the dirt around.  Is there any way of restoring these cloths (which don't
seem like cloth at all)?  I've tried rinsing, washing with detergent, all
to no avail.  At about $5 apiece, it's starting to add up!

Doug