After every three CNC jobs.
In addition to cleaning the dust screen of the CNC module and the surface of the machine after each operation with a vacuum cleaner, you can also use a cotton swab to clean the dust screen of the CNC module. Failure to clean it effectively may cause the motor of the CNC module to fail due to clogging.
Power off the machine and detach the 200W CNC Module from the machine;
Moisten a cotton swab with water and stick it inside the air inlet on top of the module to clean the dust screen until there is no dust or water.
The cotton swab is a single-use tool. If there is still dust remaining on the dust screen after you wipe it once, take a new cotton swab and repeat Step 2 to clean it again.