From: golden@guy.com   
      
   Hi, after some tap water destillation the flask have a frosty-dirty finish,   
   maybe fluor or...? the contact with fingers is feel like something "negative"   
   adhered to the interior surface, very thin but something is here. I put a bit   
   of   
   HCL after every disti. and the limes also adhered are removed but this frost   
   not.   
   I read a combination of HF + HNO3 return the glass to water clear. Is this ok?   
   what measures? 1 part of HF and 3 of HNO3? or a random mix work ok?   
      
   TIA   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)