How can fuel be removed effortlessly and without chemicals from the oven?

1. Prepare your cleaning arsenal:

Marseille soap (organic is even better!) Hot
Water (almost boiling, for maximum effectiveness)
Sponge or microfibre cloth (soft, so that your oven is not scratched)
Protective gloves (so that your hands do not dry out)
Plastic spatulas (no more metal utensils that damage your oven)
Dishes
2. Fight stubborn spots: