I'm not a newbie, but I have a newb question I am flying LH J on DEN-FRA-WAW in a few weeks. When I arrive in FRA, will I have to clear customs, or will that wait until WAW? My guess is FRA, but I'm not sure about my luggage. I have about a 6 hour layover, so assuming I'm unable to upgrade to LH F at T-2 weeks, we might go in to Frankfurt for a few hours. Thanks!