Well @theaward, the old one guessed the temp and the new one actually knows.

Oh man, that hits home. I used to get so stuck on the perfect green to brown ratio. It felt like a science project. My pile just sat there, wet and stinky. Letting go of that and just mixing whatever I had changed everything. It really is just dirt in a bucket sometimes.

Always thought that penny thing was an old wives' tale. Then my dog's water bowl kept getting that gross film no matter how much I scrubbed it. Tried @jason524's copper penny trick with a pre-1982 penny I found in a drawer. Left it in there for a week. Bowl stayed completely clean. Guess the copper really does stop the slime from growing. Changed my mind completely.