[rationalist]

I have a bidet, but I think the main problem is most people don't know how to use a toilet properly.

If you spread your cheeks apart before sitting down, there is a lot less surface you have to wipe.

If you lean forward when you go (rest elbows on thighs), you're in the anatomically correct position (the Squatty Potty's selling point).

Wipe any sweat/hairs off the seat after you get up before you flush, and close the lid (or lift the seat if there is no lid) before you flush to avoid spraying dirty water on the seat.

Having a somewhat decent diet (mine isn't great, but it's still good enough) helps a lot too: turds will have form rather than just be like a paste, requiring just one wipe to make sure things are clean.

I doubt 99% of parents teach that (and they probably don't even practice that themselves). And most people aren't going even consider optimizing their toilet routine or care about the person using the toilet after them.