The answer to 'why is my cricket trails' is that you are likely seeing cricket droppings or fecal trails left behind as they move around your home. Crickets are nocturnal insects that can sneak into homes through cracks and crevices, and they leave behind small dark droppings or 'trails' as they move around at night searching for food and water.
Some common causes of cricket trails include a nearby cricket infestation, damp or humid conditions that attract them, and access points like gaps around windows, doors, or pipes. Signs of a cricket problem can include the droppings, chirping noises at night, and even seeing the insects themselves. To solve the issue, you'll want to seal up entry points, reduce moisture, and consider using baits or traps to eliminate the crickets.