How to get rid of metal taste and smell from new thermal pot cooker

My new thermal pot cooker has some metal taste when I first tried cooking with it. It leaves a bad taste.

I decided to get rid of the problem by boiling a pot of water with some lemon slices in it. Off the flame and covered the pot and leave them overnight.

The next day, I pour away the water and lemon slices and washed the pots.

It worked for me, no more metal taste in my new dish that I cooked with it.

Step by step on how I get rid of the metal taste and smell from my new pot.