Wood Venetian Blinds: The best way to keep wooden venetian blinds clean is to dust them on a regular basis. As the surface of the slats are smooth it’s a fairly easy job to wipe them down with a cloth or brush off the dust using a clean soft duster. Another good method is to use a vacuum cleaner with a brush attachment.
Another handy tip is to put a pair of cotton gloves or even an old pair of socks onto your hands and wipe the slats between your fingers. You can also use a small paintbrush to dust the slats.
Aluminium Venetian Blinds: As with wooden venetian blinds it is best to dust this type of blind on a regular basis to avoid a large build up of dust. Again brush the dust off using a clean soft duster or a vacuum cleaner with a brush attachment.
Unlike the wooden blinds you can use water and some kind of detergent on aluminium venetian blinds. The best way to do this is to tilt the blinds so that the slats are flat. Then using a cloth or sponge with some water and some washing up liquid, wipe them over. Avoid being too aggressive and accidentally damaging the slats by bending them.