Just drop off the key, Lee. Even hard-working, über-competent and genuinely service-oriented companies–all 5 or 6 of them on the planet–have at one time or another found themselves with a client, or customer, they no longer “like“. To deal with that problem, see “Top 10 Ways to Fire the Client from Hell” at InsideCRM.
It’s full of useful tips for dealing with just-not-getting-it or lawyer-paranoid clients like (1) the bargain shopper, (2) the control freak, (3) the “one who’s never satisfied” or (4) the client who sees evil and imperfections everywhere.