I'm going to be in Europe for the summer and have currently waitlisted myself for the first class suites on the FRA-JFK route. I've booked an economy flight for the same flight as insurance. This is potentially my first big redemption since I just graduated and am just getting into the points game. I know it's a pretty popular route especially during the summer, but I checked the seat map on expertflyer, and there's only one seat taken in the entire first class cabin. It's also a Tuesday flight so I feel like it's not going to fill up any time soon. Any one have any tips in trying to get off the waitlist, ie. when to call them about it?