I have a Manhattan PM and a Galliera PM. Does it take longer for the vachetta to get darker when not in use and kept in dust bags? Also, do most people prefer the vachetta light or dark? I saw a poppincourt haute tonight that was about a year old and I thought it looked horrible. The vachetta was so dark and it looked beat. I know that it was not a fake and that it was well taken care of. It just got very dark very quickly.