5 Cleaning Spots Nobody Talks About (I Found Them the Hard Way)

First, an admission: I’m not a naturally clean person.

But I can’t stand bad smells. Working from home last week, I caught a faint, persistent mustiness—not garbage, not quite mildew, more like “stagnant moisture plus organic matter plus unknown origin.”

I walked around my apartment, suspected a few things, then spent an entire weekend cleaning five spots I had completely neglected. When I was done, the air in my home was completely different.

First: Refrigerator Door Seals

This was the most shocking discovery of the day.

My refrigerator is three years old. I’d never cleaned the door seals—the rubber gasket that runs around the door frame. Every time I opened the fridge, I could see some black discoloration on parts of it.

When I pried one section off to wash it, I found black mold in every crevice. Used an old toothbrush with baking soda paste, scrubbed hard. The runoff water was gray.

When I reassembled everything, the door sealed noticeably tighter than before. And that musty smell? Gone. Turns out it had been coming from the seals all along.

New rule: clean the refrigerator seals once a month.

Second: Dishwasher Filter

We have a dishwasher. I’d never once removed and cleaned the filter.

When I finally opened it up, I found food debris—some of it distinctly green and smelly. The dishwasher drains through this filter, but some stuff sticks to it and accumulates over time. The result: exactly what you’d imagine.

This was genuinely gross. Wear gloves. Coat everything with a thick layer of baking soda paste, let it sit 30 minutes, then scrub. Run an empty wash cycle afterward to flush the whole system.

After cleaning, the dishwasher’s performance noticeably improved. There had been times when dishes came out feeling slightly greasy even with extra detergent—I thought it was the detergent amount. Now I think the filter had been partially clogged, restricting water flow.

Third: Air Conditioner Vents

Summer’s coming. Time to turn on the AC. Except the last time I did, there was an immediate dusty smell—meaning the inside had accumulated significant grime.

Everyone knows to wash the AC filter—it’s designed to be removed and rinsed. But the vent blades that direct airflow get overlooked. You can’t just wipe them with a cloth. You need either a proper AC cleaning brush or a stiff card wrapped in wet wipes to carefully reach between the slats.

I didn’t have an AC brush, so I improvised with an old bank card wrapped in a damp paper towel, working it between the slats. The amount of dust that came out was alarming.

The evaporator coil inside the indoor unit needs separate AC cleaner if it’s really dirty. I didn’t tackle that this round—I’ll wait until temperatures stabilize above 30°C and the AC runs regularly, then do a full treatment.

Fourth: Curtain Rod

This one I discovered by accident while cleaning.

My curtains are the kind you can just throw in the washing machine, so I wash the fabric regularly but had never touched the rod. This time, I noticed the curtain pull cord felt sticky and wasn’t running smoothly.

When I disassembled the mechanism, the pulleys and bearings were packed with dust and lint, some of it clumped together. Removed it all with an old toothbrush, reassembled—smooth as new.

Recommendation: clean curtain rods twice a year, before summer and before winter. If your curtains are machine-washable material, clean the rods at the same time you wash the curtains. Easy association.

Fifth: Drains

This one gave the most dramatic results.

The bathroom and kitchen drains get used every day, so I never really look at them. When I pulled up the drain cover this time, the inner wall had a layer of slime—I’ll spare you the color description—basically the stuff drains deposit when water isn’t running fast enough to flush everything through.

Treatment: coat the inside with a thick baking soda paste, wait 10 minutes, then pour in a cup of white vinegar. It’ll foam aggressively. After the foaming stops, flush with lots of hot water.

After doing this, I resolved to do it monthly. Also: if your drain smells bad even after cleaning, the U-trap or the seal inside might need replacing. The anti-smell mechanism depends on a water seal—if that dries out, smell comes up regardless. Replacement parts cost around 15 yuan. Not expensive.

The Bottom Line

This deep clean took about four hours. Completely worth it.

I think about why these spots get neglected: they’re all hidden. Closet doors close, so we forget. Things accumulate out of sight, and the smell only becomes noticeable once it’s really bad.

So here’s my recommendation: once every season, pick a day to specifically check these overlooked spots. Daily cleaning can’t replace quarterly deep cleaning—they serve different functions.

Anyway, that’s enough writing. I’m going to go sit on the balcony and enjoy the result of my labor.