As requested by Kiki. Here's the protection spell I use.
I use a mortar and pestle on coriander and holly. Once they are thoroughly mixed I burn them and walk around the outside of my house, trying to make as perfect a circle as I can. (also make sure to carry the burning mixture with you in the mortar) As I walk along I repeat this spell over and over. "O presence of which I sense, you are not welcome within my home. You shall feel no harm from me, but may never enter this blessed circle which I create."
So yeah, it seems to have worked. I can see the stars again and Rose is back and I can hear Knight knocking things around again.