No one cleans the skid marks

Honestly, I have no idea if this is the right sub, but I am at my wits end.

Family of 5, all teens/adults and no one cleans the freaking toilets after they use it.

I literally mention it like every day!!! And there are still skid marks in all 4 bathrooms it’s like it goes in one ear and out the other. I feel physically sick every time I open the toilet lid and there are skid marks.

The weird thing is that on the whole my family is really clean, like really crazy clean. But this, this is something apparently they can’t get their heads around.

I hope this doesn’t make me sound mad, but I have literally passed bathrooms and reminded them to clean the toilet, and then they forget by the next time they go. I have taken each of them into the bathroom to show them how to use the toilet brush and cleaner, and yet they still forget about it!

Someone please help 😭