S1 Pro robot vacuum is equipped with advanced sensors that allow it to detect and avoid obstacles as small as 2.5 x 2.5 x 2.5 cm. To ensure the most efficient cleaning, it's advisable to clear the floor of any items smaller than this threshold before starting a cleaning session.If you notice that the vacuum is not effectively picking up pet hair or other fine debris, or if it mistakenly identifies long carpet fibers as obstacles, avoids cleaning under furniture, or keeps a considerable distance from cabinet edges, you may need to adjust its settings for better performance. Here’s how to do it:Open the eufy Clean app.Go to the Settings page.Select 'Robot Settings'.Disable the 'Tiny Obstacle Avoidance' feature.Disabling 'Tiny Obstacle Avoidance' allows S1 Pro to pick up smaller debris without avoiding them. However, note that with this feature turned off, the robot will only pass under furniture if the clearance height is over 10.2 cm. Be aware that deactivating this feature could cause the vacuum to interact with and potentially collect very small objects, which may increase the risk of blockages or damage. Therefore, it is recommended to use this setting cautiously and to monitor the vacuum’s performance to ensure it meets your cleaning needs.