Foul taste coming off plate even after I was washed!!!!

I bought this back in March of this year (2019). While I did love everything about it, I became alarmed at a foul taste coming off of the plate that even changed how my toddlers food tasted. I wash everything by hand and I make sure to rinse it well, however the plate seems to have retained a taste Of some sort of chemical or soapy taste for some reason. Even after thoroughly washing it and rinsing it off. I've tried rinsing with cold water and even scorching hot water and the taste does not go away. It literally changes the taste of any food I put on it for my daughter. It tastes so awful that she refuses to eat unless I use a different plate. Not sure if it's defective or only lasts a few months before needing a new one. I'm really disappointed that I'll have to go out an get a replacement one smh.

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