this needs an entomology paper
edit: hmmm https://www.thecommonscafe.com/3-simple-steps-to-keep-roaches-out-of-your-keurig-coffee-maker/
Around 40% of commercial coffee makers are infested with roaches. Garbage, sewage, and waste from humans can all be fertilized by roaches, and their intestinal parasites can spread. Look for different factors to determine if your coffee maker is infiltrated by these insects. Because coffee grounds and roaches almost look like each other, it may be difficult to identify them in your coffee maker.
Home brew forever.
https://en.wikipedia.org/wiki/German_cockroach …