There's an invisible chewed newspaper on my house's front porch. The only reason I know it is there is that it occasionally briefly appears when I exit the build menu. Sims can't clean it, I can't destroy it in build mode, and the Testing Cheats treat it as an unwalkable floor tile. It seems to be giving my sims the dirty surroundings moodlet no matter where they are in the house, although it's possible that's from another source. Any ideas on how I could get rid of it?
Update: there are actually two newspapers, one on the porch and one in the kitchen. The kitchen is contiguous with the living room, and that takes up most of the house. So, whenever sims are in the main room or outside, they have a negative moodlet for dirty surroundings.
