OMG! Why won’t this sim die?

So it’s crucial to my story that this guy; Michael Bell, the animal/berry guy that lives in the woods from the cottage pack, dies* in a fire. Sounds easy enough, right? Wrong! This guy will not die. Fire just does not touch him, is this part of his… “dna” or something? I don’t usually play with pre-made sims but he gets on well with my sim and they actually do things autonomously together without my input, I think it’s cute, hence why he moved in. He does die, I drowned him to test it, and he died fine lol but fire will just not kill the bugger. I locked him in a room, magic sprinklers keep appearing on the ceiling (why, I do not know, this must be a new thing with an update?) The lot doesn’t even have a fire alarm so I know I didn’t put them there, I literally built a new room, and empty room with JUST rugs just for him to burn and BAM, sprinklers. I tried again by trapping him with half walls, no sprinklers this time but the fire burns literally everything else except him. Why? Lol it’s so frustrating. HE WAS LITERALLY STANDING IN THE FLAMES. Ahhhhh lol

Like, how the hell do you kill a sim with fire? Is there a cheat or something? I’ve literally spent the last two hours trying to kill this guy, and he won’t die the way I want (it has to be a fire). What I have now is basically a paranoid sim, that is afraid of dying, fire, and for some reason, the dark? I think maybe because I trapped him in that room with no lights…

God, I feel awful lol

*edit: spelling
**edit; I’ve given up, he just refuses to die. I literally went to WAR with this sim lol He catches on fire, gets singed and then just stands in the flames while everything and everyone else burns around him. Even the cat (although at that point I just shut down the game without saving lmao) I’m so frustrated I could cry, but at the same time it’s so ridiculously hilarious. Whyyyyy? Why won’t he die in a fire lol???? He drowns with zero issue lol