I didn't see this, sorry.
Thank for posting that
Yes, I always leave something - preferably a long recording of 3 hours playing, take off and when I return it's often still playing.
Thus, I think, generating constant cleansing of the atmosphere. Wherever we live, of course, has been inhabited before by who knows what kind of people ? So some of that residue can remain. It may subside for awhile but return
So this is one idea to tackle that problem.
For the Feast of the Transfiguration today, a Valaam Choir short :