That, my friends, was the very last straw.
I promptly went to Bargain Hunters to procure boric acid. I then ran home, cleaned out the bottom part of said cabinet, causing a melee of activity from its dwellers when their camp-out was disrupted. Iwashed all the items that the buggies had nestled amongst (that was a long cleanup) and proceeded to do a light dusting of the boric acid in the usual spots (under/behind fridge, along baseboard of floor cabinets, under/behind stove)- including a nice heap in the corner by the front door where they like to make their entrance.
Today I concocted a nice soap and water solution and filled my newly purchased spray bottle. Just now the spray bottle executed its initial mission. The given target froze long enough when he sensed my movement to allow me to douse him nicely. How very accommodating of him. I suppose not all of Hashem's creatures have a finely tuned survival mechanism. Let's hope he took the message home to his friends. But just in case:
"Now hear this. Now hear this. Evacuate now or face the consequences. I repeat, evacuate now or face the consequences."
Watch out, buggies. Mama means business!