Dont forget to clean the top/bottom caps and drip tip too - they are metal and might be the source of the taste you describe.
And the little rubber/plastic cap that sits on top of the post...I think that's where some of my initial funky taste problem emanated...I changed it out as well as used a qtip to clean the inside of the top and bottom cap (there are what appear to be orings or a black "seal" of some sort in there) along with the hot water wash and dry burn and I haven't had any further issues.
The original little cap air dried and lost that smell/flavor and was usable again after at hot bath/wash and letting sit out overnight.
