I run the fogger tube to the top screen panel of the cage, poke a hole in the middle, and shove the tube through an inch or two. This way the fog goes downwards and spreads throughout the cage, and sometimes the water settles on leaves. In the morning it creates 'dew' affect. I suppose you could just rig it so the opening is pressed against the top screen, and then it will go through the screen, if you dont want to ruin it.