Step 1
Follow each cockroach to it's hiding spot. After you've found where that particular cockroach is living, you will know where you need to set traps and which areas of your house that you need to pay most attention to.
Chances are good that the roach den that you have found isn't the only one in your house. That means that there are more cockroaches hiding somewhere in your house.
Fifty cockroach can fit inside of one VHS tape and that's usually how many cockroaches you'll find living in a "roach den".
Cockroaches can make dens in almost any place including your toaster oven and the inner workings of items such as : computer printers, microwave ovens, stereos, TVs, etc.
Cockroaches can easily get behind furniture such as dressers, chairs, couches, beds, wardrobes, closets, etc.
You need to track down any roach dens, kill all of the roaches by hand (using a tissue) and then clear the entire area of cockroach feces and scent.
Keep in mind that you need to kill every single cockroach that you see. A few of the roaches will get away from you and this can be frustrating because a million cockroaches can infest a house if the roach problem gets out of hand.
Step 2
Clean up any uneaten food and crumbs that may have been spilled on the floor or counter-tops in your home. There shouldn't be any potential food sources for cockroaches to survive on, any where in your home.
Try these cleaning techniques to help prevent cockroaches from settling in your home for good :
Dust your home regularly using a feather duster or dust mop.
Seal up any entry or exit holes in the interior and exterior of your home.
Install tight-fitting sunscreens on your windows to prevent pests from entering when a window is open.
Keep doors closed at all times to prevent cockroaches form entering your home.
Thoroughly clean your entire house.
Vacuum floors regularly.
Use a bleach/water solution to clean off kitchen and bathroom counters. Also clean any other area that cockroaches may frequent including wooden or tile floors.
Place your toaster oven and your garbage cans in a place that cockroaches can't get to. Do this every single night.
Make sure that there aren't any leaky faucets in your home and use drain stoppers or drain plugs to plug up sink drains to prevent roaches from entering and exiting the water pipes under your house.
Clean the walls in your house regularly to prevent the build up of gunk. Cockroaches can climb up dirty surface versus slick-clean surfaces.
Wash the windows and mirrors in your house on a regular basis. Cockroaches can eat the dirt on your windows to stay alive if they need to. They can also survive by eating glue and pieces of carpet.
Clean the seals on your refrigerator and freezer to prevent cockroaches from entering and exiting.
Clean out your microwave oven and your refrigerator regularly. This will stop cockroaches from wanting to get inside of your fridge to a point.
Clean behind any dressers or large appliances regularly. It only takes one roach egg to infest an entire house! Squish roach eggs flat and wipe to ensure that any remaining baby cockroaches inside of the egg have been crushed. Then throw the cockroach egg case into the garbage. Then take out the trash. Cockroach eggs are usually hatched if you've found one, but it's still a good idea to treat the eggs as if they are full of baby cockroaches to further prevent the spread of roaches.
There is usually enough crumbs hidden somewhere inside of a house to provide a whole colony of roaches with enough food. This is why you should thoroughly clean your house everyday! Keep your home as clean as possible!