Others have addressed the actual question, so I'll comment a little on the side.

...in particular, I *am* often working in my bathrobe in the mornings

Tsk, tsk. Now, sir, you know better than that. There's major gains to be had on being formal about it, even if you are working at home. Get up, shower, dress, eat breakfast - or whatever yoru normal routine would be, and then go to work. Really. In the long run, the habit will be a major support to your sanity.