 And it's a real issue. And so, I mean, everybody who's shooting red dots is keeping a lens cloth or something handy for wiping the thing off. I was at the range just last week, same deal. I mean, I'm shooting it and going, man, that thing's just getting gunky. And you've got to clear it off. I did not know you had incorporated that. That's very cool. We had experimented with it on that spec series that we designed, that green one that I came out with. And so it worked really well, but we didn't really tell people about it. And we started adding it into our new...