Many of these should say, "still unaffordable to the masses" as money can buy most of the less outlandish items on this list.

My favorite life-hack I've come across, is dropping a couple denture cleaners in my toilets at the end of the day. Doing this once a week (or so) removes all build-up, hands free. I use the "Dollar-Store" brand of denture cleaner, because it's cheap and works just fine.