what's that smell?

Jason was feeding Kai and somehow the container went on fire in the microwave. It was only in the microwave for 15 seconds but it was enough to melt the container and make the entire inside of the microwave black! Jason SWEARS that he took off the aluminum foil seal completely off, but I certainly have my doubts...especially when I found the seal in the garbage and it clearly had a rip in it (which means parts of the seal was still on the container!) . Jason's still sticking to his story so I guess we'll never know.