Flatmates can also do bad things to cast iron, e.g. dump them in the dishwasher and let them rust. Can't tell you how many times I've had to reseason a pan. After a point I just stopped trying to educate them and said, "you buy your own stuff and feel free to ruin it if that's how you want to treat your stuff".

What happens to wooden tools after they are used? In my experience they end up in the dishwasher where they get ruined.

I put wooden spoons in the dishwasher. They don't last as long as they might, but they cost €1.

I'll handwash more expensive wooden tools.

Try bamboo. Can be soaked, it's great.

I wash them with my hands. Dish soap and warm water.