Since ever I have always had problem with Spaz's doublejump - the fact that when I jump once and then press ctrl for the second time, he often doesn't do that jump, making me press the ctrl repeatedly and often even then he doesn't do the second jump.

This is the reason why I always sucked at tests since they often require to make second jump in very specific spot..

So is there any solution for this? How do I make Spaz do the second jump everywhere?