Sometimes it's better not to think about what happened in your hotel room before you got there.
A hotel visitor has shared a note they found in their room and it's made us recoil in disgust.
The anonymous customer posted the photo onto Imgur along with the caption: "Heard something crinkle when I settled in for the night..."
The note reads: "If you’re reading this, then housekeeping did not change your sheets!"
The post has prompted hundreds of other holidaymakers to share their experiences of dirty hotel rooms on Reddit.
Some of their tales are truly disturbing.
Although the first visitor did not name the hotel in which they found the note, it has been written on Courtyard Marriott notepaper.
Commenting on the note, a spokesperson from Marriott told The Huffington Post UK: "While there is no way for us to verify validity of this claim, Marriott has the greatest concern and respect for every guest’s experience.
"We take hotel hygiene and cleanliness very seriously. As a result, Marriott has established very strict standards of cleanliness for all its hotels.
"In the unusual event a guest makes us aware of a concern, we respond immediately to the situation and take the appropriate steps to remediate the problem."