Blinds?
What type Venetian wooden / metal or cant remember what there called, the long dangley ones made of material?
If its the metal ones we just simply just feather dust those on a regular basis and dont let the dust build up. We dust both sides.
Now if they are filthy its a bit of a pain. Time consuming. You have a couple of choices here.
1. Price for them to be ultrasonically cleaned - there labour in taking down and erecting back up as well as the clean. However they may as well purchase new blinds as the cost is fairly high.
2 take them down if metal and soak them in a bath of soapy water. The wipe until done.
3. soapy water in a spray bottle and manually clean wipe one strand blind at a time metal or wooden
4. As above feather dust if just to keep dust off
hope it helps
Dave