what worked for me was a short boil in milf (3 minutes).
You know your ceramic is done when the milf boils over!
The best way to get rid of the soapy taste is to hold the rebuildable part (ceramic and the metal part the ceramic sits in) in a flame, gas stove or blow torch.
Watch this.
The taste will stay if you use just soap and water, it may diminish after time.
I couldn't remove the ceramic from one of mine without breaking it so I torched both together no problem, didn't hurt the ceramic.