The room had clearly not been cleaned outside of (hopefully) replacing the linens with clean ones in a while. The fridge had something dripped down the front of it & crumbs all in the handle. One of the chairs had visible stains all over the seat. The carpet was stained in multiple spots. The blanket on one of the beds was stained. There was a hair on the bathroom wall & the shelves under the sink had stuff that had dripped on them. The bedside table had a sticky ring from a cup & sticky drops of whatever had been in that cup on it, which I cleaned off with a clorox wipe that I had with me, so I know it could've been easily cleaned by housekeeping & wasn't. There was a spot where something had gotten spilled on the wall & hadn't been cleaned up.
The worst part though was that there were multiple spots that had what appeared to be black mold that had been sloppily painted over. Which means that the hotel was actively trying to hide that there was a mold problem in the room. Missing things with cleaning can happen (though these were a lot of things to miss), but actively trying to cover up an issue isn't okay. I noticed these spots in a corner above the shower in the bathroom, immediately inside the door to the room from the hallway about eye level, & inside the bed area higher up on the wall near the smoke detector. I never even tried the free breakfast because I was so grossed out by the room. I didn't even brush my teeth before leaving because I didn't trust the water.