Teenagers. They know everything. There's nothing they can learn from adults. Really, there isn't. All that extra life experience you've had, all those successes and failures - that counts for nothing. Because they are smarter than you.
Take our frying pans for instance. We bought some cheap, non-stick ones for frying eggs and things. When Junior started cooking for himself, I pointed out our extensive range of plastic spatulas, and explained how they had to be used to avoid scratching the non-stick stuff off the frying pan.
A year later, my fried eggs and bacon are sticking to the bottom of the pan like it was coated with super glue. So I decide to investigate.
It turns out Junior had been using my BBQ-mate, which is designed for scraping all the burnt, baked on muck off the BBQ hot plate. It's great for scraping immolated sausages from a BBQ, and it doubles beautifully at removing the non-stick coating from cheap frying pans. Using a plastic spatula was obviously too wimpy.
We now have new frying pans.
The BBQ-mate is hiding in the shed. We'll see how long it takes him to scratch the blazes out of the new ones.