The biofeedback in Spooky2 Scalar looks for changes in the scalar field. And such really need something large in the field to change such a message.
Something like a human body for example so something of saliva will be too small.
You really need something larger so it has an effect on the scalar field it can be measured by the GeneratorX.
Like a person even placing a couple of something would not be enough too when the biofeedback on please leave a large mass like a person.