Hot Wheels Color Shifting Car Doesn’t Fully Change or Revert Colors

I purchased a Hot Wheels color-changing car, but it didn’t work as expected. When we placed the car in hot water, the color didn’t fully change. We then tried to revert it back by putting it in cold water, but that didn’t help either. The car remains stuck in an incomplete color state. If the cars are going to be made this poorly, I think Hot Wheels should stop producing these color-changing models altogether. It’s disappointing to buy a product that doesn’t function as advertised, and it feels like a waste of money. I expected better quality and reliability from Hot Wheels.