Wat lah TS. So small also scared to catch. My pet tree snake long time ago also bigger than that.

Anyway, the smell is usually from reptiles when it is stressed. Especially when you're trying to catch it. Kind of like a natural defense. Best is use those charcoal freshener packs and increase airflow in the room.

Some people think spray air freshener and close the door is a good idea but that only results in getting a stinky odour mixed with the freshener smell.