I recently bought a used "mint" Summilux 35 ASPH FLE and upon receiving it I discovered the inside of the lens to be extremely dusty. Needless to say, I returned it immediately. I do wonder how this could be possible though - the lens was sold to the previous owner in 2016/10 so it's been used for about a year. I just can't believe a one-year-old lens can have this much dust in it. Is there some type of design flaw with the FLE version that makes it prone to dust? I'm thinking about getting a new one so I don't want the lens to be like this after a year...