My mother-in-law taught me this trick to clean grey dust and grime off window blinds before opening the house for spring with 0 effort. Here’s how it works

blinds are thick with loose dust, I vacuum them before wiping. I use the brush attachment on the lowest suction setting and run it lightly across closed blinds from top to bottom. This takes about 60 to 90 seconds per window and keeps the damp cloth from turning muddy immediately.

I especially recommend this if you haven’t cleaned the blinds in 6 months or more, or if you’ve had construction dust, fireplace ash, or a long heating season. It’s not mandatory, but it makes the wipe-down much easier.

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