Ice had the experience that toothpicks break too easily to clean my grinder, especially what’s in the little gap between the lid and the outside of the grinding chamber if that makes sense. But glad it works for you!
I also removed my kief tray once I started earning enough to never really run out lol
Cooking doesn’t usually go much higher than 200 - 250C (400 - 500F). Cigarettes (and I assume joints similarly) reach 900C (1650F) when puffing. I’m not sure at which point aluminum produces fumes, but I dont think the cooking argument holds up.