swiffer broomstick (paint pole) adapter

thingiverse

This lets you swap out your standard Swiffer handle for a sturdy broomstick or paint pole. The regular handle is alarmingly flimsy, which makes it hard to scrub tough messes with the wet pads that sometimes require a bit of elbow grease. Using a standard broomstick offers a stiffer alternative that won't bend under pressure. It fits perfectly into place just like the original and you'll need a small screwdriver to pry off the old handle and install this new one.