Okay, so I grabbed these blue plastic brushes on a whim because my AC coils looked like they'd been collecting dust since the 90s. Verdict? WAY more useful than I expected!

The bristles are that perfect Goldilocks stiffness - not too soft to be useless, not too stiff to damage fins. They slid right into my window unit's nooks like they were made for it (because... they were).

Bonus discovery: That little hole in the handle? Genius. Mine now dangle from a command hook near my utility closet looking all organized and adult-like.

Are they industrial-grade? Nah. The handles feel a bit flimsy if you're really scrubbing hard, but for $10 you get FOUR brushes that'll handle most home coil cleaning jobs. Lost one on my roof last week (RIP brush #3) and didn't even panic because... three backups!

Unexpected uses: 1) Cleaning grill grates 2) Dusting ceiling fan blades 3) My parakeet's cage (designated brush #4 - don't tell the others).

Would I buy again? Already did - these make oddly satisfying stocking stuffers for DIYer friends.