Whenever I moved, or even rented in the beginning, the first thing I did was change my toliet seat and front door lock. Those are the 2 most places that germs develop. So, whenever I receive or send a chip, I give it a good wash. Plus, since I am a collector, I have pride in my collection, and that collection should be clean. I received chips today that were so dirty, the yellow chip was unreadable.
I have had over a hundred sales and trade on here, and even more on ebay. And everyone here has been great. I have learned alot about a hobby that I had no idea was complexed, and expensive. Made me give up stamp collecting. (stamp collection available for sale here). However, after today I have to ask myself, clean or not to clean? That is the question?

P.S. Still looking for Hard Rock chips, lol...