Where do monsters go while Daniel is hiding?

[WALP]

They probably also need to eat so they be doing that too in the kitchen

How would that even look? Them eating.

They would place the food in their mouth and chew it, this process would be a bit longer than for humans as due to their deformed faces some food might get spilled on the floor. I do not believe they are as vulnerable to bacteria as humans though, so they should be perfectly able to pick up spilled food and finish chewing. They would then swallow the food, and afterwards take a broom and bucket to clean the floor or wherever they might have spilled food.