Vacuum cleaner abuse.
Having loved vacuum cleaners since I was 2 years old (60 years and counting) I have great respect for the vacuum cleaner, as do the members of this club. However, most people, do not. It really angers me to hear about the way a lot of people abuse their vacuum cleaner.
The first time I encountered this was back in 1968, at a demo for a new Electrolux 1205. I was up against a badly dented and scratched model E. "How did it get these dents?" I asked. "I don't know, must be from my tossing it down the stairs" she said. (Grrrr!) Other people have told me they lifted the vacuum by the hose, kicked it from room to room, yanked the cord from the wall socket, or let the kids ride it like a pony. When I was selling Kirby's there were brush rolls wound with string, fishing line, or dog/cat hair so thick at the ends, that it could hardly spin, (and they wonder why the belt wears out so fast?) I sold a Kirby to a woman because there was no suction from her tank machine. Back in the office, I found the problem, several of her husbands socks were in the hose. More times than I care to remember, I've heard this comment. "It's just a vacuum cleaner, why should I be gentle with it?"