From: jeffl@cruzio.com   
      
   On Wed, 04 Feb 2026 01:17:28 -0500, micky    
   wrote:   
      
   >What does the first sentence mean:   
   >    Moisten a microfiber cloth with a mixture of 70% isopropyl alcohol /   
   >30% water.   
      
   It means that the screen cleaner is 70% isopropyl alcohol and 30%   
   water.  More commonly, it's called "rubbing alcohol" or "medical   
   alcohol" and is intended for topical (applied to the skin) use.  For   
   cleaning screens, it's awful.  With a laptop, all it does on mine is   
   smear the surface screen grease around and leave streaks when it   
   evaporates.  Paper towels make the mess even worse.   
      
   What works (for me) is a clean and dry microfiber cloth and some light   
   pressure.  The microfiber cloth will absorb the grease and pickup the   
   dust without any solvents.  The problem is keeping the cloth clean.  A   
   new cloth works well, but it doesn't take much use to make a mess.  To   
   keep the towel from collecting dust, I keep them in plastic Zip-Loc   
   bags.  Pushing harder when cleaning *WILL* scratch the plastic laptop   
   screen.  The accumulated dirt and dust in the cloth turn it into   
   sandpaper.   
      
   "How to Hand Wash Microfiber Towels"   
      
      
   >BTW, as a disinfectant 70% is better than 99%.  Surprising, huh?  The   
   >explanation made sense, but I forget what it was.   
      
   For medicinal purposes, the approximately 30% water concentration is   
   needed to kill some types of viruses, bacteria and fungi.   
      
   --   
   Jeff Liebermann                 jeffl@cruzio.com   
   PO Box 272      http://www.LearnByDestroying.com   
   Ben Lomond CA 95005-0272   AE6KS    831-336-2558   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)