CockroachCockroaches can enter your house through cracks, crevices, vents, sewer and drain pipes. They may even enter through grocery bags, boxes or purses that you bring into the house.
They reproduce quickly and for every cockroach you see, there are many more hiding behind your walls.
Cockroaches are evasive, so the few cockroaches you have seen by day could have been forced out by overcrowding; a possible sign of severe infestation.
Cockroaches eggs are naturally protected from insecticides and without special equipment, materials and know-how, cockroach control can be a losing battle.

For the past million years or so, cockroaches and humans have actually had a rather good relationship, since roaches ate waste and provided sustenance for wild animals that humans ate in turn.  Not until a few centuries ago, when species began to carry huge numbers of diseases and populate cities, did they truly become a pest.  Today, seeing a single cockroach means that you need to take steps towards pest control so that your home does not become a breeding ground for disease.

Roaches are rarely seen by humans because they enjoy enclosed, dark habitats, preferring to stay away from open, well-lit areas.  This means that if you see one scurrying about the floor, there are likely many others not so brave.  Since roaches can eat nearly everything — mostly garbage, but also the hair we leave on the carpet and even the glue that holds books together — they can survive in every human habitat.  To combat them, the best method is to keep a home as clean as you are able to and deprive them of food and water.  This can be done by closing all food containers, cleaning any messes, eliminating puddles of water in sinks and tubs, and taking out garbage once it piles up.

If you have cockroaches, you are likely to also have other insect pest control problems.  Ants carry less disease but are far more prevalent: they will march through any part of a house to find food, breaking down barriers that get in their way.  Ants can easily be killed by sprays, however, so that they are less troublesome.  Termites are similar in size and appearance to ants, but do not care about your food.  Instead, they reside within wooden beams, furniture, or foundations, and chew away endlessly.  Regularly using a termite inspector’s services is the best prevention, since you will likely never see one even if you have a nest in your house.  Fleas hop on to dogs and cats, then onto humans.  If you have no furry pets, you are at much less of a risk.  The good news is that you can eliminate fleas with hot water and soap.

Rodents are a major pest control problem.  Mice and rats eat more, produce more waste, and spread more disease than any insect.  Worse, they can chew through containers of food as well as parts of a home and breed very quickly.  Laying down traps and poison is the most efficient way to catch and kill mice or rats.  Storing all food in thick plastic or metal containers will deter mice and all but the biggest rats.