On Oct 17, 2018, at 12:22 PM, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
  On 10/17/18 11:10 AM, Paul Koning via cctalk
wrote:
 The 1/2 inch tape drives I'm familiar with incorporate such a device.
 Typically it's a ceramic thing, so it looks like a small shiny white
 rectangle near the heads.  It has to be scrubbed clean periodically
 when it gets brown from accumulated ferrite dust. 
 Certainly mine do--some drives use a single ceraminic "blade" and others
 use a sort of comb structure.
 My tape cleaner uses a tungsten carbide blade and a follow-up vacuum
 that picks up the debris.
 But even after baking, there are a few tapes that have issues where the
 binder has bled through to the surface.  Such tapes will even stall when
 being drawn through the mechanism of a cleaning machine.
 I find that coating the tape with cylcomethicone allows the tape to pass
 freely.  The lubricant evaporates without affecting the tape in a few
 minutes-half hour.  I've used the same on floppy disks with good success.
 My application method is with a felt wick fed by a reservoir.
 FWIW,
 Chuck