From: scientist77017@gmail.com   
      
   On Wednesday, June 5, 2019 at 11:19:14 AM UTC-5, default wrote:   
   > On Wed, 5 Jun 2019 08:03:44 -0700 (PDT), AK    
   > wrote:   
   >   
   > >When I changed my tip on my Chinese copy of a Hakko wannabe, I saw a small   
   amount of black powdery residue that came out. I have used the soldering   
   around 50 times. Is that part of a carbon rod?   
   > >   
   > >Thanks,   
   > >          Andy   
   >   
   > Carbon rods?  That's just metal oxides from the heater and tip.   
      
   Okey dokey.   
      
   Andy   
      
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