<human>: Can you summarize the given text in a few sentences?

I [26F] have been dating my boyfriend [27M] for about a year.  He's a great guy--smart, thoughtful, funny, laid back, kind, has the same goals in life as I do, etc.  We have a pretty good relationship.  We've had a few arguments, but we usually resolve them quickly and both aim to improve in the future by being more considerate to each other.  He is someone I can definitely see having a future with.

However, there is one thing about him that drives me crazy...whenever he comes over to my apartment, I am constantly anxious about the mess he leaves around!  He tracks in mud, then puts his muddy shoes on the couch, leaves food out, leaves pee around the toilet seat, generally just doesn't clean up after himself well.  We actually have had an argument about doing dishes, which ended with both of us apologizing about arguing over something so stupid, and now he does help out with that (but just doesn't clean them very well...).  

In general, I am a pretty clean and tidy person, but by no means OCD.  I just like to clean up after myself so I don't have to worry about it later and can relax, which he doesn't seem to worry about.  

This is by no means a "deal breaker" for us, I just want some advice on how to approach him and ask him to be more mindful about messes, without coming off as A.  His mother or B.  Rude and controlling.  

Thanks!
<bot>: [27M] is really messy at my place, how do I [26F] ask him to clean up after himself?