The answer to 'how did cockroach get in my house' is that cockroaches can enter your home through small cracks and crevices, or be brought in with groceries, boxes, or other items. They are attracted to sources of food, water, and warmth, and can quickly multiply if left unchecked.
Common causes of cockroach infestations include poor sanitation, leaks, and clutter that provides hiding spots. Symptoms may include seeing the insects themselves, their droppings, or smelling a musty odor. To solve the problem, it's important to eliminate their food sources, seal entry points, and use targeted treatments like baits or insecticides. For a severe infestation, it's best to call a professional pest control technician.