Please note that not all waterproof items are dishwasher soap safe.
I had a Bialetti Makineta which is obviously waterproof. (it makes coffee, for god sake!)
After putting it in the dishwasher, all the metal parts became grey and touching it removes never-ending grey material.
This is not fixable in any way so I purchased a new one, saving the old one as a reminder-monument.
So to conclude, watch out for metal parts for your future dishwasher attempts; I would keep the reed plates out of the party.