Hints and tips for level 406 Soda Saga
Don't worry too much about breaking the black blocks to begin with. Look first for chances to make special candies and combos and the blockers will take care of themselves.
If you can't make any special candy then go for the blockers instead, make every move count in some way.
Once you have cleared some space to work try to stay down near the bottom of the board as much as possible and the jam will probably spread itself. But don't forget to check the whole board before every move as there could be chances to make colour bombs or colouring candies further up the board.
If you do get a good combo, try to get it into the jam before switching so more is spread.