the girl who is scrubbing the tub

Well, I solved the mystery of the missing Strawberry Quik. Of course, I'm not exactly sure HOW it managed to get past me, but this is where it went:

Yup, that is almost an entire box of Strawberry Quik, and there is a cup in there with the culprit(s) and yes, he was drinking his bathwater. After I took this picture I noticed how very very very dirty the tub was, so now I am scrubbing away. Well, I've sprayed stuff on the grime and I am quite legitimately allowing it to "soak in" I'll finish it soon.

Really, I will.

I have to, the plumber is coming tomorrow to repair our clogged toilets. I have an awful feeling maybe something got "flushed" that shouldn't have. Funny thing is, our landlord is not only telling us that we are responsible for the cost of the repair, but that we need to use her guy. I'm not exactly sure this is legal. Any advice?