The answer to 'why is my vacuum buildup' is that a clogged or blocked vacuum is a common problem that can be caused by a variety of issues. This can lead to reduced suction power, decreased cleaning performance, and even damage to the vacuum itself if left unaddressed.
Some of the most common causes of vacuum buildup include a full dust cup or bag, a clogged filter, a blockage in the hose or attachments, or even pet hair and debris accumulated in the vacuum's interior. These issues can prevent proper airflow and result in the vacuum struggling to pick up dirt and debris effectively.