New plastic kettle how do you get rid of foul taste?

I would try washing your plastic pitcher out first with straight white vinegar and then with a solution of 1/4 cup 20 Mule Team-brand borax to 2 quarts hot water. Let the borax solution soak for an hour or so.

Borax was our great-grandmothers' household wonder chemical, and what worked 100 years ago is still wonderful today. Not only that, but it's cheap and it's environmentally sound. I use it in the laundry and when washing dishes (either by hand or in the dishwasher); it all but eliminates the need for chlorine bleach (and all the damage that stuff does to clothes), and you won't believe how the dishes sparkle once they are dry.