system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does gum become harder to chew after drinking water with it in your mouth?
gpt
The gum base is very sensitive to temperature changes.

When you drink water (Particularly cold water), the elasticity of the gum base goes down and it becomes stiff and hard to chew. The temperature range of gum base is very narrow.