Why is "nice" used here?

Native speaker’s answer
Rebecca
The expression "nice and" is often used to put more emphasis on the adjective that follows, and it is used to mean "very" in a positive context. So "nice and hot" here means very hot. Here's a few more examples of this expression: Ex: The hot tub is nice and warm. Ex: I just did laundry so now my clothes are nice and clean.