"I love you from the bottom of my heart, but I don't trust you're cooking. Stay out of my kitchen."
'Oh come on, I'm not that bad!'
"Yes, yes you are. You once almost burned the house down, making toast."
'Point'
"And just last week, you tried to heat up a pizza, and managed to put a plastic cutting board in with it. I spent weeks cleaning the melted plastic off of the bottom of the oven!"
'Okay! I get it! I'll stay out of your kitchen!'
"Thank you."