My Le Creuset French oven is about one month old and I noticed that the rim on the underside of the lid might be starting to rust. I handwash and dry both pieces, but can they rust on the rims of not dried completely? I have seen previous threads in which posters dry their cast iron in a warm oven before putting it away. Is it o.k. to do this with enameled cast iron such as LC? Happy Holidays and thanks in advance for your help.