I had a problem with my Ebay imported laser.
At first it cut well, but after a few month, the cuts became ragged.
Finally, it would hardly cut at all.
David Davidson at C02lasersharpening.com told me this is a common problem with
inexpensive lasers.
For only $41, they sharpened the beam for me and now it cuts better than new.
David told me, “the optics are fine, it is the beam that needs sharpening”.
If you have this problem with an imported CO2 laser, here are some links to help you:
http://www.c02lasersharpening.com/april ... ning_sale/http://www.lasersharpening.info/2013APR01/archive/http://teacherlink.ed.usu.edu/tlresourc ... april.html