M-Triangel MG oneS Operating Instructions Manual page 26

The cleaning method is to mix anhydrous ethanol (analytical grade) and Ether
(analytical grade) in a ratio of 3:1, infiltrate the mixture with a long fiber cotton swab
or lens paper, and gently scrub the lower end surface of the focusing mirror. A cotton
swab or lens paper must be replaced.
6) During the working of the marking machine, the marking machine must not be
moved to avoid damage to the machine.
7) Do not cover the pile or put other items on the marking machine, so as not to
affect the heat dissipation effect of the machine.
The fiber laser marking machine is assembled by unit module components. The
performance of each module component is stable. If there is a fault, the fault cannot
be judged according to the phenomenon. Please contact our after-sales service
department.