Liquid water is not a mineral
The correct answer is - the Atlantic Ocean.
If South and Southeast Asia are excluded, then the moistest places on the Earth are influenced by the Atlantic Ocean. This places are the Amazon basin, the Caribbean islands, southern half of Central America, the east coast of North America, Western Africa, Ireland, and the British Islands. All of this places are very moist and it is a direct result of the Atlantic Ocean which has warm and moist currents that deliver the moisture in all of this places.
Answer:
I don't think it was because your room wasn't clean. The main cause of bed bugs is travel, which means most likely you got one on you when you went outside or something, and you accidentally got it into your room. Bed bugs hitchhike on luggage, clothing, people, etc.
If there are blood stains or dark/rusty spots on your bed/pillow, there are definitely bed bugs. The bloodstains/spots come from you crushing the bed bugs accidentally. The place where bed bugs are (in this case, your room), may also begin to smell bad. You might also see eggs laid by the bed bugs.
Let me know if you have any other questions. Good luck!