Re: General manners
Ditch the softly, softly approach.
Tell him straight out, there are rules of the house, and u gotta stick to them. This is how we operate.
Don't give him any more rides unless u feel it is totally necessary. If he wants his room to be a tip, then let it be in a state, ur not his cleaner. If it is very bad, then tell him just as your bpys follow the house rule of tidy room, so must he. Just tell him that it's easy to keep it clean if he does a bit every day.
Laundry - don't do it for him, tell him using a washing machine is easier learn than knowing how to search for porn on the computer. (Just thought I would add that in, seeing that he is as Sara says "brown".)
He be a mollycoddled young prince, don't pander to him. The sooner u nip it in the bud, the better.