I read the book I think what Robert was getting at is that neg entities that haven't already attached to humans (if it's a recent incident) running water will stop them cold. If it's the case they did attach ie I guess program the mind (through telepathy/hypnosis negs can do) then you would have to do meditation exercises and core image removal to expell them. The aromatherapy part was pretty good I like how he mentioned about marjoram that really does relax you to do good meditation exercises he didn't mention about sandalwood about everyone I hear praises that as meditation incense but still he mentioned other ones like rosemary which is somewhat similar. I guess just try it out get a submersive water pump rap it around your bed, fill a bucket of water and put the pump/hose in it see if it helps if not got to do more work/effort to remove them however even if they do attach to a human it still drains them of some energy it does have some effect on them.