1/2pcs Venetian Blind Cleaner Washable Easy Clean Tool Duster Microfibre 7 Brush

Insert Mini-Blind Cleaner, one roller between each slat. 1/2x 7 Brush Blind Cleaner. Remove Mini-Blind Cleaner from blind. Mini 7 Brush Shape Cleaner. Move Mini-Blind Cleaner back and forth to wipe blinds clean.

eBay