On Thu, 10 Jan 2019 08:07:13 -0000 (UTC), gregz
wrote:

Heads have some insulating material imbedded. Real rubbing alcohol is
supposed to have oil to prevent skin drying too much. Most don't. Isopropyl
or ethyl cleans heads.
Greg

Suffice it to say that using a substance for a purpose not mentioned on the containers label just isnt what you want. Go to a trusted computer or parts retailer and specifically ask for parts cleaner, €˜head cleaner .. etc. Because it beats re-inventing the wheel, being adventuresome, gambling, etc...