In my old apartment we had a rule that if you caused the mess, you cleaned it up. For the most part, that worked out pretty well. Until one day I decided to cook some rice in the rice cooker. It was probably half a year or so since somebody last used it. Apparently they didn't make an effort to clean it up.
The leftover rice had created the strangest and grossest mold I had ever seen. The mold had long white strands and looked like a spiderweb. Only this was much much denser and moist. The best way I have of describing it is to take half a bag of cotton balls, stretch each one, place it into a large bowl, and spray it with water.
As if that wasn't gross enough, the white strands was making some sort of gold puss that gave off the foulest scent I have ever smelled. I've shadowed endoscopy centers, labs where they process people's urine, blood, and feces, and helped deliver babies in labor and delivery. But the stench from this mold could easily overpower the smells that I experienced in those areas.
We ended up paying a friend $10 bucks to clean out the rice cooker. Surprisingly, he scooped out the mold with his bare hands. The smell didn't linger too long in the apartment. One of my roommates was a hippy so he burned a large amount of incense for the next week or so.