Tiny black flying bugs in the house, are they fruit flies?

[MoonShimmer]

Over the last week ive been invaded by these tiny black bugs, flying all round my house and they are driving me crazy! I thought they might be fruit flies even tho I have no plants and no fruit in the house, then I thought they might be from outside? So ive bleached and cleaned the bin, wiped over all the kitchen, covered the vents to outside inside a cupboard,hoovered every where, sprayed peppermint oil around, used those sticky things on the windows, cleaned the sink and plug hole as well as putting a cover over it...I had a day or two where I saw no bugs...then again 4-5 appeared so i thought maybe they were coming from inside so I got bugs nets for thr doors...got up this morning and one was in my bathroom!So can someone please help me identify if this IS a fruit fly so I know if I should be bleaching and cleaning every single inch of my kitchen please? I really thought i had solved the problem when I did have any bugs for a couple of days 🙃 I was looking forward to a lovely summer with the windows open but if this is happening already I might just move instead 😂😂 Pictures attached for help?

Are the flies definitely black? I think fruit flies are brown.

Fungus gnats? Check your plants or anywhere that could be damp, drains....they thrive in drains.

https://share.google/g6pQU3weMNcHYRYOg

I've the same or very similar, the two places I've found them is the coffee machine and the bathroom hot tap.
Bit gross to open the top where I pop the coffee pod in and things fly out! It's had a thorough clean now which has helped.
Only 3 maximum at a time though seemingly.

They do look too big and dark for fruit flies. Fruit fly traps are easy to make. Put some wine or cider vinegar in a small shallow pot and add a few drops of washing up liquid. They are attracted but can’t get out again. Worth a try.

Vinegar flies? The traps suggested by @24Dogcuddler work well for them,
too. Even better if you stretch some clingfilm over the bowl and pierce it several times with a fork so they are more likely
to to go into the liquid.

Fruit flies love old coffee grounds - I found this out when I used to recycle my Nespresso pods! Then I once stayed in a small premier inn and they were all around the coffee machine 🤢
leave a saucer of apple cider vinegar with a drop of washing up liquid - it’ll catch them if they’re fruit flies.

Have you got houseplants? I get them in my houseplants from time to time usually if the soil is too wet.