I volunteer in a classroom darkroom. Our trays get pretty dirty pretty quickly, especially toward the end of the semester. At any rate, we generally use Softscrub and an abrasive sponge, but a jar of Pec Photofinish turned up one day, and that stuff is amazing. I don't recall that it smells, in fact I think it's probably less annoying than the lemon scent of the Softscrub, and it's really much more effective. Anyway, it's great stuff and it really works.