housemate troubles 4

I was asked yesterday whether I had poured anything down the loo. I was shown a faint grey mark on the seat.
I am pleased to say that I hadn't even used that loo recently, having been away for a week. When I do, the seat it always up. So much for paranoid suspicions. Having been unable to fault me on this one, my housemate contented herself with asking me to wipe the sink when I shave in that bathroom. I do wash the hair out of the bowl when I empty my razor, but I admit that some hairs don't drop into the bowl (I use an electric shaver which does not collect all the cut hair). I'm an amenable person, so I agreed, only to be accosted through my door a few minutes later by an angry voice asking if I was going to wipe the sink.
Well, yes, when I shave there!
I hadn't just shaved, but I assumed that some leftovers were the cause of this, so I went and had a look. The bowl was clean, but in amongst the dust and fluff that collects in the less used areas around the sink there were clearly a few tiny pieces of hair. I should have counted, but there might have been 10 identifiable pieces of hair. Yes, that might be annoying for someone, but if she doesn't care about the dust, hair-dust shouldn't matter either!
I had a shower later, and regretting not quantifying my shaving disaster, I counted the hairs that collected in the plug-sieve and which caused such anger when I first moved in. There were 16, all maybe an inch long when stretched straight. So 16 inches plus maybe 1 mm in total were the cause of fuss: about the length of two of my housemate's hairs.

Have I mentioned the muck in the sink yet? She does leave bits of junk in the sinks. She doesn't wash up very regularly (something I don't mind, but have been told off about). More annoying is the sticky muck left on the side for two days now, making me careful about making my sandwiches.

I'm also still puzzled about having to put away the iron and ironing board when I've left them up in one of the unused rooms in the house.

But perhaps I wouldn't be anywhere nearly as annoyed if she had a different approach about these things. It's not only the fussiness, but the way she says it: an accusatory, impatient, slightly angry attitude. It's "Are you going to wipe the sink?", not 'You missed some hairs on the sink last time you shaved'.

I hope it's just a cultural thing: that English people tune into delicate subtleties of politeness that other cultures don't care for or create.