Amanda_O wrote: One of the biggest misconceptions I have run into is that one cleansing ought to get it.
I would tend to agree with you on this. Cleansing simply makes the house unpalatable to spirits. And if they are really determined to be there then they will be back. Depending on their resolve to be in that location is what determines the effectiveness of the smudging. It may make the home no longer be the path of least resistance towards a goal. But on the other hand, it may simply push them aside for a while and piss them off.
I think the avenue towards a desirable solution starts with determining who, what, when and where. In most older religious texts there is some reference that knowledge means power over spirits. Knowing who you're dealing with goes a long way. Knowing why its there, lets you create a plan. I'm a firm believer that there is no such thing as a one size fits all solution.