German Roaches, food roaches, dirt roaches, however you call them, one thing is for sure, you don't want them in your home. These roaches do have a stigma attached to them, people often times think they are related to being dirty, this isn't so. Roaches can be brought into a home by an number of ways. Deliveries, shopping orders, visitors, infested neighbor houses can all be ways these roaches can find their way into your home. So what do you do once you see one?
Roaches can be easily treated if they are caught early. Using a good bait can be very effective. There are gel baits, stationary baits stations, powder bait. Baits like maxforce roach gel, advion roach bait stations, or avert roach powder are all very good to place out. One thing you don't want to do is spray pesticides and bait. You will cancel out the effectiveness of the bait.
Other products like victor roach pheromone traps are good to monitor your success. Another good product to use if gentrol. Gentrol acts by not allowing roaches to reproduce.
If you do decide to spray then I would advise reading the label carefully and using a product like Phantom, which is a product that is a non-repellent. You don't want to scatter the roaches, you want them to walk over the chemical without them even knowing it.
Lastly, what I would not advise, is using "bug bombs" or total release aerosols. These products often times drive the roaches deeper into hiding and makes the job to get rid of them even harder.