A feather duster, ideally a quality ostrich-feather one starting around $15, works great on blinds, pictures, and nooks without needing any spray at all; for heavy buildup, vacuum or wipe first, then keep up with the duster every week or two after that.
Two Handy Hints for a Cleaner, More Efficient Home

One of the easiest ways to keep a home cleaner is also one of the simplest: a 'no shoes' policy at the door cuts down on the dirt and grime that get tracked in and scuff up the floors.
Dust Without Spraying
Repair That Leaky Faucet
A leaky tap can waste 140 gallons of water a week, and it's a bigger dent in the utility bill than most people realize. With an adjustable wrench, a flathead and Phillips screwdriver, some allen wrenches, white vinegar, and a scouring pad, most leaks are a DIY job, and an hour of effort can save a hundred dollars or more versus calling a plumber.
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This edition is part of the Genius House Hacks archive: 20+ years of tips, rebuilt from the original Handy Hints newsletter. Browse more hacks →