ecmelo

The standalone middle block can be cleared by 4 methods, vertical striped candy on the middle column, correctly positioned wrap+striped combo or color bomb + striped candy with the presence of mulitple candies of the same color as your striped candy either vertically or horizontally. Lastly a horizontal striped candy that is created either from the top and shifted to the same row, or being randomly created during domino effect. The jelly need to be hit twice. Its a hassle.
A video can also be watched here
candycrushsagabylengguanho.blogspot.sg/2013/06/…

you have to use a striped candy to get to it, make it be in the row or column that lines up with it., bring other like colors to it and set it off. hope that helps