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I work in a small office. There are no screens to separate work spaces and I can't help but notice when my co-worker picks his nose or wipes his nose with his hand when he has a cold. He then goes on to use things in the office that I also need to use sometimes even though at this point I wish I didn't. To make matters worse some of my co-workers very often leave the toilets in a state. It churns my stomach having to use the restrooms because they are more often than not absolutely disgusting. I don't know how to speak to anyone about this. Perhaps I am a little afraid to start a conflict at work.
If this was only a matter of a person with body odour I would probably just bring a scented oil to put on my desk. I don't want to get ill because of someone else's bad habits so I feel like I need to discuss this with the management but I honestly don't know where to start. It is a very small company and would be very awkward to bring it up.