15 is definitely old enough to clean up after herself. I agree with zbmom. Talk to your husband and see if maybe between the two of you, you can get through to her?

And as far as her being bp as well, she really should understand where you're coming from. Sometimes kids that age think that the whole world revolves around them, and it wouldn't hurt to remind her that you are not just her mom, you're a person too. You have problems and issues just like anyone else, and she needs to understand that. you're not just there to serve her.

really hope things get better soon.