If you live in a free-standing house that is NOT attached to other houses, your roach problem can be cured 100 per cent. If you are in a row house or are attached to another home, it will depend on your neighbors. These are the most common roaches, the ones we see almost every day. Roaches are related to ants and wasps. They have been around for some 350 million years, long before mankind, and will be around after mankind.
Roaches have microscopic hairs, called cerci , that can detect air movement.
This helps them escape predators by detecting their approach. They can even detect the particular gust created by an approaching predator with air blowing all around them. This is why they can disappear even before you get close. Each egg case the female produces may carry up to 50 new little roaches. The good news is that German roaches don't live outside.