It sounds like your nana’s “hack” is the classic low-effort blinds trick that actually works surprisingly well.
Here’s the usual version of it:
You take an old sock (or microfiber cloth), spray a little vinegar-water mix or plain all-purpose cleaner onto it, slip it over your hand, and then clamp it on both sides of each blind slat. Instead of wiping top and bottom separately, you just run your hand along the slat once—both sides get cleaned at the same time.
If the “2 minutes, 0 work” part is what she meant, the shortcut is usually this variation:
You lightly dampen a sock with a mix of water + a few drops of dish soap, put it on your hand, and then run it across multiple slats in one pass. Because the cloth grips both sides, dust comes off instantly without repeated wiping.
Some people make it even faster by:
- Using a kitchen tongs wrapped in microfiber cloths (so you clean both sides at once)
- Or using a dryer sheet, which also reduces future dust sticking
It’s not literally zero work, but it feels like it compared to wiping each slat individually.
If you want, tell me the exact version your nana used—I can pin down the precise “2-minute” trick she meant.
