Every nappy bin on the market works beautifully for about four days. After that the tropics take over. Warmth speeds up the bacterial breakdown, humidity keeps everything moist enough for it to carry on, and the sealed container you bought to contain the problem makes it worse.
We're on the ninth floor in Punggol with the bin chute at the end of the corridor. Remember the chute.
Why bins fail faster here
The smell is ammonia, produced when bacteria break down urea, and that reaction is temperature-dependent. A flat at 30 degrees runs it a lot faster than a European nursery at 18. A sealed bin also traps the humidity that keeps the reaction going, so opening a three-day-old nappy bin here is a memorable experience.
Any strategy that relies on holding waste for longer is working against the climate, and any strategy that gets it out of the flat sooner is working with it.
Do cartridge bins earn their refills?
The sealed-cartridge systems, the ones that twist each nappy into an individually wrapped sausage, do work, and they work better here than a plain bin because each nappy is sealed away separately and never shares 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 comes down almost entirely to one thing, and it's a thing nobody outside Singapore would think to ask: 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.
The rest of the setup
What works
Frequency beats every product on the market, and everything else here is a way of making frequency easier. Empty it daily. It's unglamorous and free and more effective than anything you could buy, because the tropics reward frequency over containment. Wrap soiled nappies individually before they go in, since the nappy's own tapes fold it into a parcel and a small bag around a stool nappy costs ten seconds. Stool goes down the toilet. That one habit removes most of the smell on its own, and it's what the packaging on most diapers already tells you to do, which almost nobody reads. Choose a bin with a sealing lid, because swing tops vent with every pass. Wash the bin itself weekly, since the smell embeds in the plastic and at that point you're deodorising the source. Keep bicarbonate of soda in the base, refreshed weekly, which is cheap and works a lot better than scented inserts, most of which simply add a second smell on top of the first.
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.
Every other day is realistic. Every third day is optimistic and you'll know about it. Soaking pails are worse in the heat, and they're a drowning hazard besides. I'm not sure the every-other-day figure holds in a flat with a dryer. 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. Circulating air distributes the problem very efficiently around a room you were hoping to sleep in, which I discovered in our first flat and haven't forgotten.
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.