system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the tiny *crack* that happens when you touch/move just a tiny bit things like TVs, monitors, furniture, doors after they've been untouched for a while?
gpt
If its been there for a while the dust will accumulate right around the edge of contact with the surface its stood on.

The dust gets right into the tiniest gaps as all dust does and over time it gets a little sticky as a result of the temperature and humidity levels changing throughout the day.

This can ve observed by just not dusting some finished countertops for a really long time. They will eventually become sticky to the touch.

The crack you are hearing is the sticky dust seal breaking.