Luckily, no need at my house, either
I was at my uncle's the other day. My cousin's hubby was vacuuming out a cabinet after a flour spill. He turned on the H. Windtunnel (bagless)... the 'scent of dog' almost knocked me out. Of course, the BIG THING WE ALWAYS HEAR when asked about changing the FILTER is . "There's a filter"? But, it's bagless....just empty the bin. Um, NO!
And, that, boys and girls, is lesson ONE w/ a bagless vacuum cleaner.