How often do you switch substrate?

[Godzilla78]

If it doesn't stink and isn't dirty, I spot clean and keep it for however long it takes to become dirty, depending on the snake. Some snakes poop every week, some poop/pee only once every 3 months, so it really depends.

i agree 100%, this is exactly what I do.
i find coco fiber to be the best for absorbing waste and easily removing it. I can just keep spot cleaning coco fiber and replacing empty spots with new fiber virtually forever.