It is SO hard to keep it contained. Don't beat yourself up if you can't. There is no infection that makes me tear my hair out more than this one.

Warm soapy water will do the trick, especially if you guys already reek of tea tree! You need to spray and wipe any toys that she handles or sucks. Also, spray and wipe your change mat after every change, as well as the bath - obviously bath them separately. It is really hard work, and it's exhausting. Sounds like your DH will be pretty helpful though, always a good start!

Good luck.