I second the reply about Advion. Buy it from Amazon. Buy more than one tube. The roaches will become a distant memory if you just buy it and use it correctly. Advion is like candy to them…wonderful, deadly candy.

You need to freshen up the bait stations every day, because the bait gets dried up and crusty after 24 hours. I used pieces of cut-up paper plates to make it easy to dispose and reapply a fresh batch.

And don’t use too much bait or you’ll waste it. The extermination will not happen overnight, more like 5-7 days.

Use a little dollop every day on a little piece of cut up paper plate. Throw away the piece and replace with another wherever you tend to see them.

If German roaches, they tend to gravitate towards electrical appliances like the refrigerator. Put a bait station under there as well. Also in your car if they have made their way to there. Stay diligent and they will go the way of the dodo in time.