Yes, when I'm depressed and during dysphoric mania, my hygiene goes in the toilet. My house in shambles. When manic, I start tons of craft projects and have stuff everywhere. Then I crash, and the stuff remains, and more stuff accumulates until I'm well.

I have physical issues and chronic pain. Showering is painful for me. I have extreme temperature intolerances and I either get out of the shower sweating profusely, or I'm shivering and in so much pain I can hardly stand it. So now my hygiene isn't the greatest, even when stable. But I'm able to push through the pain, much easier when stable, so my hygiene does improve greatly.

Are you sure you are stable when your hygiene is off? Are you sure you're not still borderline depressed?