Anyway to answer your question, the clearcorners are really just a hit or miss. I have heard that the APC ones are pretty bad, but then again I have also heard the opposite. Bottomline being they are hit or miss. I have a set that have lasted me wel over a year and a half strong and no yellowing whatsoever. But I got mad lucky, I still don't even know how or why I did. In fact the previous set of clear corners I had before that yellowed out in a few months and totally sucked.