Use "smoulder" in a sentence

1. the deep brown smoulder that, by the end of the evening, turned into nothing more

2. A welcome pressure on my arm brought me to my senses, but my guilt began to smoulder

3. A couple of sacks in front of the door had started to smoulder

4. Humanoid bodies litter the concrete and armoured trucks burn and smoulder

5. He watched it smoulder in the crystal ashtray on the dressing table

6. It will smoulder all night and help to keep the fire going