I agree with others, I think that chip looked better before getting cleaned but...

here's a kind of a gross story for you and the reason why I clean all of my chips... I purchased a big lot of chips once and sifted thru the items. After a bit, I grabbed my blacklight to check out the UV security marks. To my horror, the tips of my finger tips were glowing! Yuck! Now all my chips get a least a gentle rub down with antibaterial soap.