Hi
I've been digitizing my VHS tapes, using a Sony SLV-LX70S player and a GV-USB2 capture card, passing the signal through an LG DR-7923M DVD recorder, which seems to have a built-in TBC.
After playing several tapes, I noticed some marks on the image, typical of dirt on the heads. I decided to clean them as I always do, with cotton swabs and isopropyl alcohol. After that, the SP tapes showed no problems, but the EP tapes showed some white horizontal lines. I thought I had inadvertently dirty them while cleaning them, so I looked for a better way to clean them and came up with the printer paper and isopropyl alcohol method. I did it, and this is the result (this tape is SP).
I think I ruined the heads. Is that correct?