Quote Originally Posted by Waterlogged View Post
TheMash, Do not use CLR, it's just more of the same acid based cleaning solution that you've been using.
Okay, no problem.
I wouldnt find it in Italy however
Anyway, thank for suggestions. Very very useful. You're very kind.

I started to clean everything today, with hot tap water only and then many wash with deionized water (another brand of course).
Maybe is it the time to open a thread for a worklog?