Vacuum dust bags are annoying. They’re expensive, one time use, and if you have an older vacuum cleaner, good luck finding replacements! [Karl] got fed up so he decided to make his own reusable dirt bag instead.
He’s using an old t-shirt as the new bag material but notes that you can use any other sufficiently drafty material as well — as long as it stops the dust but lets air through, you’re good! To seal the bag he’s using a piece of rubbery vinyl with a hole cut in it to seal against the intake pipe. This is sewn to the t-shirt with a piece of cardboard sandwiching the fabric. From there it’s just a matter of adding a zipper or Velcro, and you’re done!
He’s been using this filter for over a year and hasn’t had any problems with it yet — you can even wash it! While you’re at it, why not make a wet-spill attachment for your vacuum cleaner too?
[Michiel] likes to wash his clothes in warm water. Like a lot of machines, his draws from the cold water line and heats it electrically. Gas is much cheaper than electricity in the Netherlands, so he wanted to be able to heat the water with gas instead. Hot-fill machines already exist, but few models are available and they’re all too expensive. [Michiel] rolled up his sleeves and 
