Replacement Lens for O-Like "Cute" 50mW?

I cannot seem to get my lens clean on my o-like "cute" green laser. No matter what I do (lens pen brush, air, micro-fibre, cue-tip+rubbing alcohol), there's always this "dust" around the emitted light-spot on the wall. There are no diffraction scratch lines or anything, just a ring of random blurred dots/etc. Unless someone here has another idea, I'm probably going to try and find a replacement lens. Here's a pic of it:



I've looked all over the place and can't seem to find the same size/type of lens. Hopefully one of you guys can help me out here.

Thank you!!

You can buy a replacement lens from anyone of the following;

DTR, cajunlasers, Jayrob, and survivallasers. DTR and Jayrob sell "G" lenses which will be great, but are quite expensive. You can buy a glass lens from SL or CL for a lot less, and it will work the same or better than the lens that was in there originally.

I'm a newb when it comes to lenses. Is there any specific size/type I need to buy to fit this? Are all lenses the same size/thread type, just different nM? Do I have to get a lens that directly pertains to my laser nM?

And a kind of off-topic question: I just bought an o-Like 250mW "Power Rock" Red laser. Who sells the best red laser glasses? Don't want to take any chances with this one. And what should I expect with the beam brightness? As bright as the green/same/less brightness? Sorry for going off my own topic, lol...

Easiest thing you can do is order this lens:

445nm AR Coated Standard Glass Lens Assembly

In terms of brightness, expect it to be about as bright as a 5mW green.

You can also buy safety goggles from SL. They aren't certified, but do work great.

Thanks for the link. I'll probably end up getting that and some glasses.

And I figured 250mW would be as bright as my 50mW green at the least Maybe I should have asked before I bought it. I'm sure it's pretty bright in the night sky, no? I occasionally burn stuff but most of my laser usage is beaming the night sky.