Robot Vacuum Skipping Spots? Check Obstacles, Edges and Map

This guide groups the manufacturer checks into four topics: access, lighting and obstacles, edges, and mapping. To choose a check, the guide suggests noting whether the robot could reach the spot, whether the area appears on its map, and whether dirt remained after it passed through.

Why a robot skips a spot

The guide groups the checks below by topic; choose the topic that matches the missed area.

1. Access. Doorways with a threshold, entrance carpets, mats and cords can block the robot. ECOVACS FAQ 481 says that a carpet, mat or sill above 2 cm stops the robot from passing. FAQ 102 gives 16 mm for a threshold it cannot climb unaided. These are different figures from different FAQs, so check your model’s own specification.
2. Lighting and obstacles. Samsung’s FAQ says a dark, cluttered room can lead to incomplete coverage and recommends more light and fewer obstacles.
3. Edges and gaps. The eufy S2 article says the robot cleans only areas wider than 36 cm. Tight corners and dark or transparent surfaces near walls are also covered there.
4. The map. eufy’s missed-areas article asks you to confirm that cleaning started from the station and that the missed area is shown on the existing map. ECOVACS FAQ 102 covers map resets and moving the dock. Samsung covers re-mapping in SmartThings.

Identify what kind of miss you see

Note whether the same place is missed each time or whether the gap changes between runs. Record the location, any doorway obstacle and whether the robot entered the area. This record is the guide’s suggestion, and it makes support requests easier to answer.

For a robot with a saved map, compare the location with the app. A missing area belongs in the mapping problems guide. If the robot crosses a boundary you marked as off-limits, use the no-go zone guide.

What changes by model

The table lists what each manufacturer source says for this symptom. Before following a map or cleaning-mode step, check that your app shows the named control.

eufy: missed areas and edge mode

The eufy missed-areas article asks you to check that cleaning started from the station and that the missed area appears on the existing map. It also asks you to check for obstacles blocking the path in that area or room, to make sure people or pets did not move the robot during cleaning, and to compare the edge wheels for uneven wear. Its last step is to turn on log upload and run the robot several more times.

If you notice uneven wheel wear, this guide suggests noting which side is affected and reporting it to support with your observations.

On the eufy S2, the edge article says the robot cleans only areas wider than 36 cm. A narrower gap is not a setting to change. For an accessible edge, remove small objects near walls and corners, then use Zone Clean on the area that remains dirty and watch whether the robot enters it. For the RoboVac 15C, 25C, 30C, 35C, 15C Max, 25C Max and 30C Max, the cleaning modes article lists Edge with Auto, Quick Clean and Spot. Select Edge in the eufy Clean app. After the Edge run, this guide suggests checking whether the missed area is clean.

ECOVACS DEEBOT

ECOVACS FAQ 481 separates a repeated miss in one area from gaps that move between runs. For the same area, it asks you to check whether Bypass carpet cleaning is set to avoid carpet. In that setting, an entrance carpet or mat can make the robot skip the area; the FAQ suggests trying Auto strategy. For misses in different places, it advises against following the robot during cleaning and suggests moving objects the robot steers around out of the cleaning area.

FAQ 102 starts from the dock and asks you not to pick up or relocate the unit during cleaning, so it can build a complete map. For a home too large for one charge, Continuous Clean returns the unit to the dock when the battery runs low and resumes the unfinished area afterwards. For areas only slightly wider than the unit, the FAQ suggests trying Custom Clean, while warning that entering them may be difficult or impossible. The FAQ gives 16 mm as the height above which a doorway threshold is too tall for the unit to climb, so you need to help it over the threshold. If areas are still missed, reset the map, move the dock to another room or wall, and start cleaning from the dock again. If the problem persists, the FAQ says to turn off the AI function in the app and start from the dock again.

FAQ 102 also asks you to remove light, soft rugs or mats, cords and footwear from doorways, and not to stand for long in doorways, halls or other narrow passages. Apply the AI-function and map steps only on a model whose app offers them.

Samsung Jet Bot FAQ

Samsung’s FAQ, which names Jet Bot models, says, for incomplete coverage in a dark or cluttered room, to turn on the room’s lights so the vacuum can navigate more reliably, and to clear obstacles and clutter from the floor. It describes up to two more attempts before a cycle ends; separately, it mentions up to three attempts when explaining why the vacuum docks and stays there. Auto Clean resumes after recharging. For focused cleaning, the FAQ suggests Manual or Point Cleaning mode, or Spot Clean on certain models, and using the remote for directed cleaning. It also says that lifting the vacuum during operation erases its navigational map.

For missed areas, the FAQ mentions reflective surfaces or an object present during mapping as possible reasons, and suggests requesting a re-map in SmartThings. In its separate map-update answer, it says mapping does not happen every time and instructs you to clear existing mapping to re-map the area.

When to stop and contact the manufacturer

If the same accessible spot remains uncleaned after the relevant checks, contact support with the model, the app, the location, the time of the miss and what changed after each attempt. Include a map screenshot if your app provides one. This guide suggests telling support whether the spot is physically inaccessible or whether the robot repeatedly avoids an accessible area.

If the eufy missed-areas steps apply to your robot, turn on log upload, then run the robot several more times and note the time of the problem. The article asks you to keep people from moving the robot; keeping people and pets away during the test is also this guide’s advice, so the test reflects the check you made.

For broader symptoms, start with the robot vacuum troubleshooting guide.