We have a separate shower room from the bathroom.
I never shower, morning bath instead. DC bath. DP is the only one who uses the shower. To be fair to him he does a manual job and comes home minging so the first thing he does is shower when he comes home.
I've just been in the shower room for the first time in about 6 months. Oh my fucking god it is FILTHY. Like properly bloody minging. I think there's stuff growing in the shower. Black mould, hair, pubes 
I've just called him to ask WTF and he laughed and said yeah I wouldn't look in the cupboard if I were you. I've just looked and it's full of empty toiletries that he's chucked in there.
I told him he could fuck off if he thinks I'm cleaning it and said meh I don't really mind it 
I'm closing the bloody door and not going back in AIBU?!