There are billions of bugs around your own home even if you are a neat freak,
Any, doors, walls, handles 5 m of a toilet, or a rubbish bin, the entrance, kitchen,
Coming from the UK I am surprised that it's the norm on many new houses to build a separate WC without a basin so that you only get to wash your hands after handling a couple of door handles at least. In the UK you are required to have a basin in the same space or in the space you pass through to access the WC.