Hello LTH!
I figure I've lurked long enough. 2010 is a year for action!
So I'm wading in on this innocuous--but critically important--issue. I think probably most cooks would agree that if you could only pick one thing that goes on/in fire for the rest of your life, it'd be an enameled dutch oven. Considering that le Creuset dutch ovens of a decent size are not cheap, and that it would be preferable to pass them on to your progeny, it's important to figure the parameters for use.
I grew up in a house with food, where the received wisdom was that le Creusets were bulletproof, provided one abstained from using any kind of abrasive pad to try to clean them. If things got really bad, my mom would dissolve dry dishwasher detergent in super hot water and kind of massage the chunks off. I guess she's some kind of pot whisperer, because (of course) when I tried this for myself the first time, I irreparably scratched part of the descoware gratin pan (pre-le creuset) I got from my grandmother. (I know you're probably wondering how something got scorched to a gratin pan; I will tell you now: college roommates!)
As you can imagine, the scratching-the-heirloom incident made me feel somewhat timid when I finally got my own dutch oven. I had a tough time really going for it with my meat browning until I got this revelatory tip from my mom: Mr. Clean Magic Erasers will effortlessly remove anything stuck to an enamel cooking surface! I have been using this method regularly for over a year, and there has yet to be a mess to which it is unequal. Additionally, I have been unable to discern any pitting or thinning of the enamel as a result.
Mr. Clean has been such a great help to me--I can now fearlessly prepare to braise--that I thought I'd de-lurk to share, and also to say thanks to LTH for being such a rich, vibrant community.
best wishes,
Elizabeth