You seem to have the imaginative capability of a semi-rotten turnip.
Here's a hint: maintenance is a thing that happens.
Still lost? Okay, here's an extremely specific example that actually involved me.
The air system at my job completely failed, so we called in a repair company.
The very first thing they did was go around to every vent tying little ribbons on each one, then fiddled with the thermostat to verify that everything was, in fact, completely borked.
Various stages of the repair process included visually checking for fluttering ribbons, sometimes - gasp! - via the security camera system. And you kniw what they didn't bother doing after repairs were complete and they packed up and left? Go around and cut off all the ribbons.
Now, go sit in the corner and think about how you're lowering the average intelligence of an entire planet by existing.