2 May 2026 · Samantha Lin
Designer · Mother of two

Diaper Bins and Smell in the Tropics

A bamboo muslin hanging in humid, overcast air above open water

Every nappy bin we've owned has smelt fine for a few days and then not, which is our experience in one flat and not a test of anything. Warmth makes the smell build faster, humidity keeps everything damp, and a sealed container you bought to solve the problem can hold it in instead.

We're on the ninth floor in Punggol, with the bin chute at the end of the corridor. That chute comes up again below.

Why it's worse in a warm flat

Most of the smell is ammonia, which forms as urine breaks down, and it builds faster in a warm room than a cool one, so a flat at 30 degrees isn't a European nursery at 18. Smell is a nuisance, though, and not a measure of germs. A bin that smells fine isn't necessarily clean, and a smelly one isn't necessarily dangerous. It tells you the bin wants emptying.

Anything that keeps waste in the flat longer works against you here, and anything that gets it out sooner helps.

Do cartridge bins earn their refills?

The sealed-cartridge systems, the ones that twist each nappy into an individually wrapped sausage, did keep the smell down for us, because each nappy is wrapped away separately and doesn't share air with the last three days.

The catch is the refills, which are a recurring cost across the entire diapering period. I priced ours at about S$25 a month, so roughly S$700 over the diapering years. Whether that's money well spent depends almost entirely on one question nobody outside Singapore would think of: how far your bin chute is from your front door.

If the chute is on your floor, a plain bin emptied daily wins on every measure and the cartridges are money you didn't need to spend. If emptying means waiting for a lift with a toddler attached to your leg, the cartridge system is buying you something real.

On plastic, I'd be careful with green claims in either direction. A cartridge wraps every nappy in its own length of film, while a plain bin uses a liner plus whatever small bags you wrap the dirty ones in, so which uses less depends on how your household does it. I haven't found a total-plastic comparison I'd trust, and I won't pretend to know.

The rest of the setup

What works

Emptying often is the whole routine, and everything else here just makes that easier. Empty the bin daily. It's dull and free, and in this heat getting waste out of the flat does more than sealing it in. Tip solid poo into the toilet first where you can, which is what council waste guides in Australia advise, and the nappy itself goes in the bin, never down the toilet. Wrap soiled nappies before they go in, since the nappy's own tapes fold it into a parcel and a small bag around a dirty one costs ten seconds. Choose a hard bin with a lid that closes properly, because swing tops vent with every pass and a hard surface can be washed. Wash the bin weekly with hot soapy water, rinse it and let it dry, since the smell soaks into the plastic. We keep bicarbonate of soda in the base, which is cheap, though I can't tell you it does more than the emptying does. Skip fragranced inserts and sprays: they can bother sensitive noses and skin, and they only hide a bin that needs taking out.

The cloth version of the problem

If you're using cloth, dry pailing, a lidded pail, no soaking water, is the standard advice and it applies here, with one adjustment. The wash interval that works in a temperate climate is too long in this one.

In our flat, every other day has been realistic and every third day optimistic, and you'll know about it. Soaking pails are worse in the heat, and a bucket of water is a drowning hazard besides. I'm not sure the every-other-day figure holds in a flat with a dryer, because ours doesn't have one.

Where to put it, in a flat

Keep the bin near the changing station, because a bin you have to walk to is a bin that doesn't get used, particularly by whoever is doing the changing while you're at work.

Still, keep it out of the bedroom overnight if you possibly can. A service yard or a kitchen corner is better, and if you're emptying daily then moving it costs you nothing at all.

Don't put it anywhere near the air-con. Moving air spreads the smell around a room you were hoping to sleep in, which I discovered in our first flat and haven't forgotten.

I couldn't find NEA guidance written for nappies, so we follow the ordinary household rules: tie the bag, and send it down the chute or to the bin centre the way your town council tells you to.

Empty it often, use a hard bin you can wash, clean it properly, and keep it where the baby can't get to it.

Reading

This guide is general information, written to help you understand a topic and ask better questions. It is not medical advice and does not replace your own doctor, midwife or paediatrician. Anything that worries you about your baby belongs with them.

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