Death by Fire?

I tried for two days to kill a sim by fire, but nothing worked. In Sims 3, death by fire was my preferred way to kill sims. I actually built special rooms away from the main home and placed a fireplace, bed, couches, and some end tables decorated with flowers in there. Once the fire started, the sim went pretty quickly and it worked every time. But now since they made death so much harder...the fire method no longer works for me. :( I ended up starving one sim, and the other died from embarrassment.