I am trying to control an Internet-of-Shit device that can only speak 2.4GHz wifi. I find that I am unable to operate a 2.4GHz network that anything can connect to on any channel because there is too much interference. (Even when my iPad is sitting directly on top of the AP.) 82% interference, 10% TX retries. Let's take a look at where that's coming from...

Oh. It's because literally every car in the garage is doing wifi bukkake, several floors below me, through many feet of concrete.

Previously, previously, previously, previously.