Well, I trim the traps off once they start to dry out and blacken – they’ve only got so many snaps in them, and I’d rather encourage new growth than trying to power a failing trap. So, the only reason you don’t see any blackened traps on mine is because I just pruned them!
As for watering, the best way to do it is to put the pot inside a tray at least a couple of inches deep and “water from the bottom”. I haven’t had much luck pouring water over the soil, but pouring it into the tray allows the roots to soak it up. They can stand in water for a long time, so I just refill when the tray is mostly dry.
Also, they need distilled water. Blackening parts of the plant can mean it’s being poisoned by minerals.