What housekeeping habits gross you out?

People have very different ideas about housekeeping. Some people try to keep their homes clean, and looking nice, but their habits often backfire.

One thing that always grosses me out is when I see a big pile of dirty, stinking shoes just inside the front door, either directly on the floor, or thrown upon some makeshift shoe shelf.

I get that some people don’t like to wear shoes inside their house, but looking at a steaming pile of shoes is just gross. Unfortunately, this practice seems to be becoming more common.

Some people, thankfully, deposit the dirty shoes into piles in the garage, or on the back porch, rather than right inside the front door. In CA, we don’t generally have mud rooms, but there are other places to put the dirty shoes.

What housekeeping practices gross you out?