Okay, so a long time ago I told my boyfriend that I'd lend him my speaker system, since it's better than his and we spend all of our time at his house anyway. He didn't take me up on it at the time but he's just texted me asking if he can have them since his are now broken. Since we first got together he's got a lot slobbier and he hardly ever hoovers. He smokes near constantly and often ashes on the floor (ughhhh!) and I now feel like if I lend him my speakers they'll get destroyed by the dirt and ash and dust.

So what do I do? How do I politely tell him that he can only borrow them if he looks after them without him getting offended or accusing me of nagging?

What would Jolie Kerr do???