Years ago, our first house was an old Victorian that had been rebuilt over the years. The front bedroom had been a porch and did not have hot-water radiators. Instead, someone had installed forced hot air off the furnace manifold.
Well, we had a lot of cats. Cats like to find and play with and then kill mice. One mouse fell through the hot air register and down into the furnace manifold. So every time the heat came on, the bedroom smelled like hot, dead mouse. In desperation, I poured some Aqua Velva down the register. Big mistake. Then, every time the heat came on we could smell dead mouse wearing Aqua Velva, which was infinitely worse. Took months for the stink to stop.
You should have used “Fabreze”, like Cindy Anthony!
Now that's funny!
LOL!
The rat in our attic(and he was huge) apparently came into the house wet from rain and shorted out some wires above our bedroom. It was summer and he had already started to stink by the time the electrician came to fix the shorted out wires. Even though we removed the dead rat the smell hung on for about 2 months.