Cockroaches usually do not show up during the day because they are nocturnal insects. Since they are rarely seen, you may not be aware that your home is infested with cockroaches, even if it is. If you happen to see cockroaches during the day, it is likely that your home is already heavily infested.

It is important to detect the presence of cockroaches in your home as soon as possible. Cockroaches usually hide in dark places during the day, behind sinks, stoves, refrigerators, and washing machines, as well as in narrow cracks in the walls or underneath mats or furniture. They always try to avoid well-lit areas in the house, and they are rather difficult to spot.

However, cockroaches do leave some marks around the house when they come out at night. Fecal marks are one of the sure signs that your house is infested with cockroaches. The droppings of adult cockroaches are cylindrical in shape, while young cockroaches leave feces that look like black powder. You can judge the level of cockroach infestation in your home by the amount of droppings you find.

Some cockroaches also emit a musty and oily smell, which will become stronger as the infestation becomes more severe. Another sign that shows that cockroaches are present in your home is cockroach egg cases. These cases are oval-shaped, and they can be found in hidden places such as gaps between books or behind furniture.