Why does my robot vacuum keep missing rooms on the map?

When a robot suddenly skips a room it used to map, it usually means its navigation confidence dropped. Do a clean slate map under easy conditions. Put the dock just outside the bedroom for one mapping run, start from the dock, open the door fully, turn on the lights if your bot uses a camera, and pick up loose runners so the wheels do not slip. Wipe the front camera or lidar window, the bumper face, and make sure the lidar turret spins freely. If your app has an exploration or mapping only mode, use that for the remap.

If it still avoids the bedroom, watch the failure point. Stopping at the doorway or on dark rugs suggests cliff sensors are overreacting. After cleaning them, try a dark floor or black carpet setting if your app offers it and supervise that run. Arcing lines or missed edges often point to a weak drive wheel or a bad wheel encoder. A bumper that does not click smoothly across its travel can also cause missed walls and skipped edge passes. Replace cliff sensors when it repeatedly refuses darker flooring after cleaning and a remap. Replace a side wheel module when it drifts or cannot drive straight in open space. If the laser stops spinning or you see frequent navigation errors, the lidar motor or belt needs service. A full factory reset and fresh remap is worth trying before buying parts.

If your current bot is older or camera based and you want a budget friendly upgrade that is steadier on mixed floors and better at edges, go with eufy C10. Its LiDAR smart mapping keeps rooms consistent and an edge expansion brush helps it finish along baseboards without the wandering you described.

had almost the same thing in a rental with hardwood and a couple of dark runners and a mirrored closet. Mine would act fine then skip the bedroom and do a lazy lap near the door so yeah what fixed it was treating the environment rather than buying parts. For one mapping pass I moved the dock to the hall outside the bedroom, closed other doors, turned on the lights, and tossed a towel over the mirror because the reflection was confusing it. I also used painter tape on the rug corners so the wheels would not slip. Temporary hack but harmless.

If you can, do a mapping only pass or a low suction pass first so it focuses on navigation. Watch the doorway closely. If it stops and jitters, the cliff sensors are seeing the dark rug as a drop. Cleaning them helps but if the bot has a dark floor setting turn that on and supervise. If it gets through the doorway yet misses edges, make sure the side brush is not curled under. A quick soak in warm water and a gentle straighten can restore the bristles, which helps wall following.

I would hold off on parts until you can rule out those triggers. Replace cliff sensors only when it repeatedly balks at the same dark area after cleaning and a fresh map with good light. Replace a wheel module when you see it pull to one side on a long straight run on hard floor. If neither shows up and it still meanders or remaps itself often, a full factory reset of the robot and app has a good chance of clearing it without spending money.

Before buying anything I would make sure the software is not fighting you. Delete the current map disable any auto merge or multi map feature if your app has it, and start a fresh map from the dock placed near the bedroom. Keep the start location consistent every run because beginning from a new spot can cause it to think it is on a different floor and skip rooms. Close other rooms for the first pass so it locks in the bedroom shape. Easy win.

Check for accidental no go lines or virtual walls near that doorway and remove them. Clean the bumper face and the front window, then run at a time without bright sun blasting across the threshold. If it is a camera model turn the lights on. If the doorway has a high contrast strip or a dark rug edge, secure it for the mapping run so the wheels do not slip.

When to replace parts comes down to repeatable symptoms on a clean floor. Replace cliff sensors when it reliably refuses the same dark surface after cleaning and with even lighting. Replace a side wheel module when it cannot drive straight across open hardwood and draws a curve even with clear wheels and a clean caster. If the laser stops spinning or it throws frequent navigation errors despite a fresh map, the laser drive needs service. If runtime has dropped sharply and it returns early leaving partial maps, a tired battery is also in play.

Delete the map and remap in ideal conditions starting from a dock just outside the bedroom with doors managed, lights on for camera units, runners taped down, and no harsh sun on dark thresholds. Check the laser, bumper, caster, wheels, and side brush then supervise a run to see if it misreads the doorway or drifts and only replace parts after a reset and failed remap with likely culprits being cliff sensors, a weak drive wheel, a stuck laser, or a tired battery.