Generally it disappears when you are distracted or when you look away for a moment. But it STILL happens even if you don't.
bryan.derksen
As an experiment/vengeance, I'll try eating a poisoned sandwich. If it doesn't disappear I'll just spit it out again, otherwise whoever's stealing my sandwiches will get it.
If poison doesn't work because I'm dealing with some kind of supernatural entity, I'll put a time bomb between a couple slices of bread and try that. If it doesn't disappear I'll spit it out and disable the timer.