If the spirit or ghost activity does not stop, or stops only for a while, then resumes,
you may want to do a spiritual cleansing of your home. This is the traditional
practice of "smudging" a home to get rid of an unwanted ghost:

1) Crack a window in each room of your home and take a dried bundle of sage
(available at most metaphysical stores) and "smudge" your home clearing out any
negative or stagnant energies. Smudging is simply lighting the sage bundle,
making sure you have a safe receptacle to catch the ashes in, and walking around
your entire home allowing the smoke to circulate and cleanse the energy and
space.

2) Being firm and unemotional, walk around each room of your home, while saying
loudly and firmly, "This sage is cleansing out all negative energies and spirits... all
negative energies and spirits must leave now through the windows and not return."
Do this until you sense the negative energy has gone and the room's energy
lightens (to a positive - look for peace) and then say, "In the name of God , this
room is now cleansed."  Know and sense this.

3) Remember not to worry about how you sound if you stumble on your words.
The main thing is your intent, which is your faith. You have power and have
nothing to fear. Your intentions are to rid the home of negative energies and
spirits and they will know this, if they are there. Always work with your own energy
from within your soul and incorporate this energy into the cleansing.  Draw your
divine power from within your innermost being.

Always be firm, unemotional and deal with negative ghosts strongly, yet in love.
You are always in control and are not powerless.  Some like to re-visit a cleansed
house by going back into all of the rooms with a pleasant incense such as
lavender while inviting all loving, protecting, positive spirits into the home. You may
end the ritual by lighting a white candle and setting it on a table to burn for a bit to
"seal" the ritual.