How often should I de-scale my machine?

[spoke]

The Ikon manual suggests decalcifying every 2-3 months.  Im making about two shots a day.  How often should I be de-scaling my machine?  

[purple]

Re: How often should I de-scale my machine?

I am interested in this too...we have very hard water here in Perth so I am tempted to do the process fortnightly-monthly if it is not going to be detrimental to my Ikon.