After nearly 10 years away from it, I am about to embark again on digitally mastering historical audio from cassette then reel to reel tape. Back then, I simply cleaned the heads frequently. But I now note that the original Sony manuals for both my major "near-pro" consumer cassette and reel to reel decks talks about frequent demagnetizing. Before I pulled out my father-in-law's venerable Radio Shack 44-215 Head Demagnetizer, I googled a bit and discovered that some believe that it is not powerful enough to do the job. Some of the folks who had actually done servicing stated that the Han-D-Mag made by R. B. Annis Co. is the only affordable demagnetizer that is powerful enough to properly do the job, especially for capstans and other solid metal pieces in the tape path. Here is a typical article: Cleaning and Demagnetizing Does anyone have any experience to confirm or deny the Han-D-Mag recommendation?