If your Bambu Lab X1 Carbon displays a dirty Micro LiDAR lens warning, check the calibration board, power down the printer, and gently clean the correct external lens. Bambu Lab specifies isopropyl alcohol and a microfiber cloth, with a cotton swab as another option for reaching the camera. Let the surface dry before powering up and testing again. A warning that persists after careful cleaning needs further troubleshooting, not harder scrubbing.

For print farms and individual operators, the first challenge is finding the right surface. The Micro LiDAR camera is separate from the chamber camera. Wiping one does not clean the other.

Confirm the warning and identify the lens

Read the full message before starting. Bambu Lab identifies HMS_0C00-0100-0001-0004 as the Micro LiDAR dirty lens warning. Other LiDAR messages may require different troubleshooting.

In its dirty lens troubleshooting guide and location diagrams, Bambu Lab places the lens to the left of the LiDAR fill light. Match those close-ups to your printer so you can distinguish the lens from the light and surrounding housing.

Also locate the calibration board on the right side of the heated bed. Bambu Lab's procedure starts by checking that this board is clean and in good condition. Inspect it before concentrating all your attention on the lens. If its condition is questionable, seek guidance rather than applying an unverified cleaner or scraping its surface.

Prepare clean tools and a safe work area

Wait for the printer to finish or stop the job safely. Allow the hotend and bed to cool, switch off the printer, and disconnect power before reaching inside. Keep alcohol away from hot surfaces and ignition sources, and follow its safety data sheet. Do not inspect the optics with the laser operating.

Set aside a clean microfiber cloth suitable for delicate optical surfaces and the specified isopropyl alcohol. Keep lens-cleaning supplies separate from cloths used for grease or build-plate adhesive to avoid transferring residue.

For teams evaluating alternatives, Super Brush foam swabs for electronic applications offer soft, lint-free foam without contaminating adhesives. However, Bambu Lab's instructions do not identify or approve a particular Super Brush model. Confirm optical-surface suitability, tip clearance, and chemical compatibility before substituting an applicator. A small tip is not automatically a suitable lens-cleaning tool.

Clean the external lens with minimal pressure

Check your view before making contact

Use adequate lighting and compare the assembly with Bambu Lab's diagrams. You should be able to see where the cleaning material will touch. Avoid working by feel around the hotend or pushing a tip into an opening you cannot identify.

This is external cleaning. Do not remove the LiDAR housing, disconnect its cable, or attempt internal lens cleaning as part of this routine. Those actions belong in a separate, manufacturer-directed service procedure.

Apply a small amount of alcohol to the cleaning material

Lightly moisten the cloth or permitted applicator, rather than spraying liquid into the toolhead. Use only enough to dampen the contact area; it should not drip. Avoid household glass cleaners, fragranced wipes, and other substitutions that the printer guidance does not specify.

Bambu Lab's maintenance section names isopropyl alcohol but does not give a concentration or dilution recipe for this lens. Do not treat a forum mixing recipe as a manufacturer specification. Ask Bambu Lab if you need clarification about the cleaner you have.

Wipe gently and inspect

Follow the lens surface with light contact. Do not scrape a deposit with a fingernail, tool, or exposed swab handle. Move to a clean section of cloth, or replace the applicator, if it picks up contamination. Stop if access requires force or if the surface appears damaged.

After cleaning, check for remaining smears or fibers under good lighting. Allow the alcohol to evaporate completely before restoring power. Drying time depends on the amount of liquid and the surrounding conditions.

If your team is qualifying a foam applicator, Super Brush's foam chemical stability resource can inform material screening. It does not establish compatibility with the LiDAR's optical surface or replace a process evaluation.

Test the printer and respond to a returning warning

Once everything is dry and the work area is clear, restore power and start a printing task as Bambu Lab directs. Check whether the message disappears. Keep hands and cleaning tools out of the printer during motion and scanning.

If the warning returns, confirm that you cleaned the actual lens and checked the calibration board. Record the exact message, when it appears, and what you cleaned so support can assess the problem.

If careful cleaning does not resolve it, contact Bambu Lab support through the troubleshooting guide. Its next step is after-sales assessment for Micro LiDAR replacement. That does not mean every persistent warning proves the module has failed. Avoid repeated scrubbing, speculative disassembly, or disabling checks simply to hide the message.

Set a maintenance interval that matches your materials

Bambu Lab's X1 maintenance recommendations call for cleaning when a warning appears or the light is abnormal. For regular ABS printing, the manufacturer specifies cleaning the camera every three to five days because deposits can collect on the lens. That interval should not be presented as a universal schedule for every filament and workload.

In a shared print environment, record the material being printed, the cleaning date, and whether the warning cleared. Keep clean optical-maintenance supplies readily available so operators do not reach for a used grease cloth.

To evaluate swabs for a documented maintenance process, ask Super Brush about applicator options. Share the access dimensions, optical-surface requirements, and approved cleaner before selecting a tool.