Shelter and access: the two remaining factors the source did not fully document
The original article identifies four attractants — food, water, shelter, and access — but the available text covers only the first two in detail. Shelter and access are named as the remaining factors without further explanation in the source material.

What is documented is the broader principle: cockroaches are not a sign of a failing home, but a practical indicator that one or more of these four conditions is being met. Removing them, one by one, is the recommended approach.
The source article covers food and water as the first two of four documented attractants, with shelter and access named but not yet detailed in the available text. Whether the full version provides specific guidance on sealing entry points and reducing clutter — the typical measures associated with those two remaining factors — remains to be seen from the complete publication.
