This negative energy hides in the corners. I always recommend the Three most important remedies to all my students in India and abroad. If you have a carpet, place small containers with sea salt, in all the corners of the house. Salt has natural qualities to absorb negativity. I Will recommend you to use the sesame oil and keep the fire Burning at all times.
Fire burns out all the negativity.
If you don t believe in keeping the fire burning in the house, you may substitute it by installing a zero watt flickering bulb for twenty -four hours. This should be in your prayer room. Do this, take any type of metal bell and go around house. Don t forget the corners. Notice the sound of the bell when you do it for the first time.