The "BEST" way would be to watch them in matches, surely? How else would you be able to see what's happening? Go to the analysis where your cross attempts are shown and click on the circle. It'll show you the cross. Then it is a simple matter of looking. Do you have strikers in the box to get on the end of the crosses? Are they good enough to win it in the air or will a low / whipped cross be better. ETC. It's that simple.The best way to check why the crosses arent effective. Well I honestly dont know what to do then, Im trying to make you understand that I dont know how to fix the problem and what instructions etc to implement to make what I want to happen actually happen.