I know I can use oven-cleaner but it's extremely caustic. And I don't want to wear myself out scrubbing. Is there another way?
Use Sodium Bicarbonate, or baking power.
- make a thick paste, by adding a small quantity tape water
- Cake it onto the gunk. Leave it for an hour or so
- Come back and scrub it off -- maybe using salt as a abrasive.
It works on the exact same principles the oven cleaner does, but it is much weaker.
I used it for quiet a while til I realized oven cleaner does it much better and faster. But the oven cleaner does leave me coughing.
Use a sturdy fork to chip off most of it, until you can see patches of enamel showing through. Then spread a layer of hand soap over the area, and lay a wet cloth over it to prevent drying.
In half an hour, return, and use the cloth to wipe off the loosened gunk. There may be a little left, which you can easily scrub off, or repeat the above procedure.