This one is ****ing me. It's the one with all of the black boxes in glass at the bottom. I can break the glass with jewels easily but really struggle on the black ones. At best I can break up to 3 when I get the special jewels that destroy entire rows, or I might get lucky and get a "No Matches" pop up so that the black boxes are moved elsewhere. But even then I run out of moves and can't destroy them all. Any advice that doesn't involve buying a boost?