Why is your next attempt the last one? You have 4 attempts at each exam.
Also, the graphs in the CAPs have the wind factorisation included, if you didn't know already. That's why the tailwind lines have a greater gradient. However, this excludes the graphs for obstacle clearance, as the wind component for obstacle clearance does not require factorisation.
When using a chart for the purpose it was designed, travel to the reference line first, then follow the grid lines to the relevant data point. Then move to the next grid. Otherwise, travel to the data point first, then follow the lines to the reference line before moving to the next grid.
Accuracy should be to within one small square.