I make no promises, but the Nina pictures may show an improvement in quality now that I've cleaned the sides of her terrarium. This one, for example, turned out pretty well, except for the fact that it looks too dark here. (It didn't look this dark before I uploaded it. It may be easier to appreciate if opened in its own window.)
I don't know how long I expect this improvement to last, since I, or she, will dirty the walls up again sooner or later, but even so, I feel pleased with myself for having gotten the walls clean momentarily. Maybe I should be taking a couple months' worth of pictures now just in case.