A bubble almost always dies because the water in its film evaporates until the film gets so thin it pops. Relative humidity controls how fast that evaporation happens: in humid air, water leaves slowly and the bubble lasts longer; in dry air, it evaporates fast and the bubble pops almost right away.
Adjusting your recipe for the weather
That's why the same formula that works wonders on a humid day can flop on a dry, windy one. The fix is to adapt the mix: in dry weather, lean harder on whatever holds water and stabilizes the film. Temperature matters too — together with humidity, it sets the air's overall "drying power."
The KUANTIKA engine uses humidity (and, in beta, temperature) as an input variable, and panic button mode tells you what to raise or lower based on the conditions at your show.