Weber S-420 catch tray cleanup?
I have a Weber S-420 that I've had about a year now, and love grilling on it. I find cleanup of grates, flavorizer bars, and lower cooking area easy, but I haven't been able to keep the catch tray below as clean, since it is too far from the heat source and baffled by the lower cooking area body, for effective burn-off. To clean it, I pull it out, take it over to a trash can, scrape off everything I can, and wipe it with paper towels. This is fairly easy, but not very effective - greasy areas persist.
I'm thinking of trying some sort of degreaser spray, but worry about residue affecting food flavor.
Another thought would be to invert it inside the cooking area, atop the grates, while doing the burn-off. But I'm reluctant to try burn-off on this rather thin stainless piece (even if it would fit).