How often do you clean the laser?

I have noticed my laser does not cut as always. Tonite I will try cleaning lenses, but… how often do lenses should be cleaned?

When I can see mirror no.2 has a hint of dullness, I clean all the mirrors and the lens. It is quite convenient because mirror no.2 is easily accessible for inspection. I have not experienced that the lens is dirtier as mirror no.2, so it fits reasonably well with the timing.

Whenever I think of it :slight_smile: sometimes it is once a week… sometimes once a month.

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