I keep mine covered with the hard cover.
If you just wipe it down with oil after cooking, it should be fine. When I've gone an extended time w/o cooking (which almost never happens), I've noticed some rust looking spot where the lid 'legs' contact the surface. But after scraping and rubbing with oil again, they're gone.
If you just wipe it down with oil after cooking, it should be fine. When I've gone an extended time w/o cooking (which almost never happens), I've noticed some rust looking spot where the lid 'legs' contact the surface. But after scraping and rubbing with oil again, they're gone.