Buy the cockroach bait the one ridset one that bring the poison back to family.

Last time I move to one condo got this issue, tot got 2-3 only, once but bait, next morning saw more than 10

Since then I just leave the poison bait there and never have cockroach issue anymore, 10 years d, and yes my unit near to trash area. Also I bought the strap that slide under door one to prevent pests entering