Cassie experienced a traumatic noontime event: a warm bath. One minute she had pats and scritches on the couch, the next minute her human herded her into the guest bathroom and hoisted her into the tub. Then she had utter confusion and her human rubbed her vigorously all over (which felt nice) while dumping pitchers of warm water on her (scary!).
She survived, of course, and promptly got a 30-minute walk to shake it off. She smells so much nicer, and her coat no longer has the greasy feel it had taken on in the last couple of weeks.
We'll see how long it lasts. I'm also washing the blankets I put over the two couches she likes to sleep on, which I hope helps keep the grime off a little longer.