The vomit situation is not an every day thing. I remember my flatmate vomiting all around the sink and then falling back in to bed. When 24 hours later I asked her to clean up the horror, she looked at me like I should have cleaned it up for her! (She was so posh, I don't know if that had anything to do with it, or if she thought I could have done it because she was sick, she wouldn't have done it for me though).
But yeh, the dental floss, I can see that, and it's not that disgusting, if there is no need for cleaning then there would be no cleaner to see the mess in the first place. The need for the cleaner in the first place is what creates the job opportunity!
Cleaners are usually young these days, when I was a child, cleaners were older ladies but these days they tend to be young women from abroad and so they don't have the pragmatism of the older women who just think, right, this gets me out of a spot, i can fit it around my own schedule, and doing cleaning for 3 hours a week doesn' t change my identity. But that is maturity.
So if once in a while you have to clean up vomit, well, suck it up. I have never even worked as a cleaner and I've cleaned up shit (when I worked in a fast food restaurant). Also cleaned up vomit come to think of it when I was volunteering in a care home.
It wasn't pleasant but I didn't think about it afterwards.