Omtech POLAR+ User Manual page 89

2. Clean the lens of the 3rd mirror and both
sides of the focus lens in the same way as
the 2nd mirror's protective windows.
3. Gently remove any other dust or debris from
other components inside the laser head and
wipe the shell's holes clean as well.
4. Before carefully replacing it, allow the
magnets to grab hold and pull it back into
place.
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