Laundry detergent will kill roaches and here's how you make some roach bait with laundry detergent.
Combine one part laundry detergent with one part sugar in a bait station or lid.
Add a pinch of borax if desired to make the bait even more effective; borax is commonly used to control roach infestations. The sugar is used to attract the roaches to the bait.