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leatherman
Active member
I have seen the question arise many times about the proper way to clean cards. Often, people will give the advice that "cleaning with T-shirt is fine." I disagree with this, and here is why:
My wife and I got new glasses back in 2005. We both got the anti-reflective coating, which is essentially a micro thin plastic layer on the outer surface of the lens. Having a microfiber lens cleaning cloth next to my desk (for cleaning cards), I cleaned my classes daily with that cloth. My wife used a T-shirt, napkins, whatever she had around...to clean her glasses.
Last year, the anti-reflective coating on her glasses began to break down to the surface of the lens. It has gotten progressively worse, and the lens is exposed in over 50% of its surface. It is quite easy to sell where it fails, as it is now reflective. My glasses have no failure in the anti-reflective coating, and I clean my lenses far more often than my wife (I am a little obsessed with it). It is obvious that the T-shirt is actually scraping part of the surface away with each cleaning, as the areas losing the coating are in the central areas where rubbing would occur in every cleaning.
I know that most people aren't going to clean the same card anywhere close to the number of times you clean your glasses. However, each swipe of that T-shirt on your gold refractor auto is taking something off the surface, and eventually that something will be a scratch. Why risk it?
My advice: Spend $5 and get a microfiber lens cleaning cloth. It's worth it.
David
My wife and I got new glasses back in 2005. We both got the anti-reflective coating, which is essentially a micro thin plastic layer on the outer surface of the lens. Having a microfiber lens cleaning cloth next to my desk (for cleaning cards), I cleaned my classes daily with that cloth. My wife used a T-shirt, napkins, whatever she had around...to clean her glasses.
Last year, the anti-reflective coating on her glasses began to break down to the surface of the lens. It has gotten progressively worse, and the lens is exposed in over 50% of its surface. It is quite easy to sell where it fails, as it is now reflective. My glasses have no failure in the anti-reflective coating, and I clean my lenses far more often than my wife (I am a little obsessed with it). It is obvious that the T-shirt is actually scraping part of the surface away with each cleaning, as the areas losing the coating are in the central areas where rubbing would occur in every cleaning.
I know that most people aren't going to clean the same card anywhere close to the number of times you clean your glasses. However, each swipe of that T-shirt on your gold refractor auto is taking something off the surface, and eventually that something will be a scratch. Why risk it?
My advice: Spend $5 and get a microfiber lens cleaning cloth. It's worth it.
David