There are a number of sprays and chemicals that you can buy
in the stores, but you are going to need to vacate the property for a
set amount of time. A roach can go undetected as it lives between the cracks
and seams of a cardboard box from a grocery store or food plant.
When they die they start to smell and he will usually smell them before he
can find them and he has a one floor unit with no basement.
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