Can i reburn my essential oil?

i use to burn essential oil in my room,


but sometimes i juz burn it for a while since i'm not staying in the room all the time,,when i go out, i'll just take off the fire.


so the next day i'll reburn the same residue again..





but i found the smell is abit different.





is it safe to reburn the residue?


or should i discard it everytime and burn with new one?Can i reburn my essential oil?
Essential oil is some kind of volatile (evaporates easy) fragrance oil in a more stable base (mineral oil). When the essential oil gets hot, it evaporates, releasing the scent. Later, there may be some essential oil residue in the mineral oil. But, it's ';essentially'; all out of essential oil fragrance. That's why it kind of smells funny.