Yes! A magnet is an extra step, off the critical path. One needs to add soap eventually; why not use it as signal? This is the same principle I keep trying to explain to my college: Data should be entered ONCE then sourced everywhere needed.

This is my system for my work apartment. My wife rejects it at home, for reasons I don't understand well enough to relay. I go along, I want to stay married.

On that theme, why is this post about emptying a dishwasher? The crucial issue in most good marriages is how to load the dishwasher. Emptying is pretty obvious.