I purchased a pair of Ray Ban wayfarers from http://www.amazon.com/Ray-Ban-RB2132.../dp/B0029U15S0 and they've just arrived. I assume because of the ratings, the fact that Amazon goes through decent vendors, and the price I paid they are authentic. However there seems to be creaking in the frames of the sunglasses whenever I touch it. Does anyone know about this issue? Is it easily fixed?