I too have a difficult time, intermittently, with this issue. I am still quite new to the FWC and about half the time, for no obvious reason, I cannot push up hard enough to latch (and sometimes unlatch) the latch. I thought it was the thermal pack material getting in the way and causing enough pressure to cause this...but I am not convinced yet...still susing it out. Complicating my particular problem is that after I pull my front end down it never stays down...it will pop right back up. I even have a hard time keeping it down pulling with all my might on the push rod. So I usually have to go outside and climb quite high on the side of the truck and pull the top down...sometimes it stays and sometimes I have to pull the rear down first then the front. It is a learning curve that has taken longer than I would have anticipated.