You put the ray gun down for a moment and slide off your t-shirt. You had just done laundry, so it was very clean. This would be the perfect test.
You lie it on the ground, making sure to avoid the dust, and then grab the gun.
"Here goes nothing" you say pulling the trigger, and the greenish beam emits again hitting and engulfing the shirt. When the glow stops, you look down and gasp.
Your shirt was covered in stains that looked as though they had been there for ages, as if the shirt hadn't been washed in months. It was utterly fifthly, The ray gun had turned your clean shirt into the shirt of an utter slob. It worked.
You look down and then decide...