The horrible kind.
(My keyboard looks cleaner when photographed with the flash off.)
What kind of maintenance? That oh no, I don't want to shake crumbs out of my keyboard kind. Yes. That.
Putting the EW in QWERTY.
This time, though, I was concerned about the mouse. An optical mouse feels sluggish and unresponsive. Is it the plague? I believe it is the plague. Nay.
Aye, the plague it is.
Nay, it cannot be. The optical mouse is not prone to the dread disease.
We must operate upon the creature's innards.
All those in favour, reach for the screwdriver.
Writers, look after yourselves. Scribblers, secure your files. Save your data, and save in more than one location. Wordsmiths, maintain, fix, or replace vital equipment.
Those of you writing books on your interactive smart rings, sentient piercings, or wifi-capable coffee mugs should take the keyboard/mouse advice and adapt accordingly.
What was inside my mouse? Er.
By that, I mean ew.
There were fragments of toffee. Am I a passionate consumer of toffee? Coffee, yes. Toffee, no. The mouse was upset by fragments of a toffee-like substance. I'm going to draw a veil over the rest of that scene.