How to Protect your thick black pot while using ur rice cooker?

Here is what happen when i am selling a rice cooker, a woman came and ask for a rice cooker that doesn't have black coating at the inner rice pot.....erm...u can't find a rice cooker black coated pot(i have never seen one before).
The woman told me she wants to find that because everytime she cooked rice using rice cooker, the bottom part will get sticked and very hard to remove, when she try to scratch it out, the black coated thing come out together too....she say was not good for health.....=_=

Here is a few solution:
1. Put a small piece of butter together with the rice or use olive oil(both works), in the end the rice won't stick at the bottom and ur rice will smell better^^. U can wash ur rice pot immediately without soaking it with water. In addition, it wont spoilt ur pot too...

This a small trick i use when i cook rice, it really works. Happy cooking...