I have a couple of ADJ Gobostar's that are about 18 months old now and get fairly heavy use and I'm fairly sure that the laser element in them isn't as bright as it used to be...

They used to hold their own in daylight, and now I'm struggling to make them out in a relatively dark room. I'm not sure if I've dislodged something in the optic path (nothing obvious there) or if the diode's are failing?

Any experience here? Do diodes get dimmer, or just fail?

Julian