Your system should rid traces of bars within 4 days
        
             
        
        
        
Drinking water and going to sleep? 
        
                    
             
        
        
        
Explanation: Chemicals
There are four primary chemicals in the brain that effect happiness: dopamine, oxytocin, serotonin, and endorphins. By designing gamified experiences that activate these chemicals, you can increase your users' happiness and loyalty.
 
        
             
        
        
        
What is the reason for sanitizing dishes, utensils, and food preparation surfaces?
To kill any bacteria and protect you from contamination, food poisoning...