Can of Wasp Spray

I have a can of wasp and hornet spray on my desk It says killer on it. Do I feel guilty? Not a bit. Will I use it? Oh, yes! During the day the wasps hide out in cracks and crevices. But when my computer is on at night, they creep out of their places. Landing on my screen, startling me. Like flying mice only more deadly. When they land on my arm I have to resist the urge to swat them. I have been stung before. Most unpleasant. I reach from the green can, at the ready.