Dreams dictionary: Soot

Dreams dictionary: Interpretation 1
To see soot in your dream symbolizes immortality. In particular, if you are covered in soot, then it signifies your subconscious and the negative aspects of yourself. It is the part of yourself that you fear or are ashamed of.
Dreams dictionary: Miller Dream Interpretation
If you see soot in your dreams, it means that you will meet with ill success in your affairs. Lovers will be quarrelsome and hard to please.