Do not add milk to your tea pot, because it is hard to wash. If you love to add milk to your favorite tea, you can use Glass Cup to instead of tea pot, i think this would be a good choice for you. Or you can try the tea which is already scented with milk essence, like https://www.jkteashop.com/imperial-jinxuan-milk-oolong-tea-p-984.html
As for me, i like the natural taste of tea, without any other things like sugar or milk or....whatever...