What makes AWS waste hard to catch in day-to-day operations?
Many AWS cost leaks are not outages. They are resources that still appear valid enough to ignore, so they survive normal operational review even while they keep charging.
Should AWS cleanup start with detectors or with a broad category guide?
Start with the detector if you already suspect a specific resource pattern. Start with the category guide if you know the cleanup theme but want the full set of related checks.
Are these AWS pages only about obvious idle resources?
No. They also cover quieter storage-governance problems, such as incomplete upload cleanup and stale teardown residue, that can compound spend without looking like classic idleness.