Okay, so I finally got around to testing this fin cleaning kit on my crusty old window AC unit. Here's the real deal:

The stainless steel comb is LEGIT for fixing bent fins - it's like a tiny rake for your AC. I was skeptical but it actually works without snapping anything.

The plastic whisk brush? Game changer for dust bunnies hiding in tight spots. Used it with some foamy cleaner and wow, the difference is visible.

Pro tip: The foldable blue brush has this flat edge that's perfect for digging out weird debris (found a dead bug and what I think was a popcorn kernel??).

Not gonna lie - if your coils are super caked with years of grime, you might need heavier tools first. But for regular maintenance? This set gets the job done without breaking the bank.

PS: The metal tool makes a satisfying 'ping' sound when straightening fins - weirdly therapeutic!