Well, the lid is definitely picking up smells from flavored teas. My plan is to deodorize it and continue to use it only for unflavored teas. I will buy an infuser made of a non-porous material (still looking to find the right one) for when I brew flavored teas in the future. I still love this teapot, though!
You might consider buying separate tetsubin for the preparation of different genres of tea… I only prepare straight teas in mine and use glass carafes for flavored blends.,,