glassware water clear

[Golden guy]

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

[Libor Striz]

HF would create rather dim surface, dissolving glass.