Put a bottle in the shower drain: what happens is unexpected

So where do the cockroaches in your home come from?
We cannot find a clear answer to this question. One way cockroaches enter a home is by crawling into a bag, fruit box, or other carrying item.

We ourselves allow the insect to enter the house alive or simply in the form of eggs completely involuntarily.

However, cockroaches also have another route of access via the sewer system , as they usually occur in large numbers in the sewer system. This