5 Things to Know About Robot Vacuum Side Brushes

Side brushes sweep dirt from baseboards and corners into the main roller’s path. The main rollers cannot reach right up against walls, so the side brush handles that gap.

They prevent the dust border that often builds up along baseboards. Without a side brush, floors may look clean except for a visible line of dust against the wall.

Most robot vacuums include at least one side brush. It is a standard feature on nearly all models, though some higher-end models use two.

Side brushes are usually replaceable and wear out over time. Bristles can bend or break, so check them periodically and swap them when they no longer sweep effectively.

The brush design varies by brand and model. Some use stiff bristles, others use soft rubber or a combination, affecting performance on different floor types.