Answer:
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
What is the word that even in plain sight remains hidden?
What is black when it's clean and white when it's dirty?
What is black when you buy it, red when you use it, and gray when you throw it away?
I describe a toilet cleaner as well as one of Santa's reindeer
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.