If your towels have stopped absorbing water, your dark clothes look faintly dusty, or your favourite t-shirt feels stiff instead of soft, there is a good chance you are using too much detergent.
It is the most common laundry mistake there is, and it is completely counterintuitive — because more detergent feels like it should mean cleaner clothes.
What actually happens when you overpour
Detergent works by surrounding dirt and oil so water can carry them away. That only works if the water can then rinse the detergent out.
Your washing machine uses a fixed amount of water per cycle. If you add more detergent than that water can rinse, the excess has nowhere to go. It stays in the fabric.
Once it dries, that residue does several unhelpful things:
- It coats fibres. This is why towels stop absorbing — the residue is mildly water-repellent, which is the exact opposite of what a towel is for.
- It dulls colour. A thin film over dark fabric scatters light and reads as faded or dusty.
- It stiffens fabric. That crunchy feeling is not the fabric wearing out. It is buildup.
- It traps odour. Residue holds onto the very smells you washed the clothes to remove.
- It can irritate skin. Detergent left in fabric sits against your skin all day. For anyone with sensitive skin or eczema, this alone can be the whole problem.
It also builds up inside the machine, particularly in the drum seal of front-loaders. That is where the musty washing machine smell usually comes from.
Why almost everyone overpours
Three reasons, none of them your fault.
Caps are oversized. Many detergent caps hold considerably more than a single recommended dose. Filling the cap feels like the natural thing to do.
Fill lines are nearly invisible. They are moulded into translucent plastic, in a dark laundry room, in a cap that is already covered in detergent.
Modern machines need less than people expect. High-efficiency washers use far less water than older machines, so they need noticeably less detergent — but habits were formed on the old ones.
How to tell if this is happening to you
Run a load with no detergent at all. Just clothes and water.
If you see suds, there is detergent buildup in your fabric. That foam is coming from residue that was already there.
It is a slightly startling test the first time.
How to fix it
Strip the buildup once. Wash the affected items with no detergent, on the hottest setting the fabric allows, and run an extra rinse. Repeat until no suds appear. Towels may need two or three passes.
Clean the machine. Run a hot empty cycle with a machine cleaner or white vinegar. Wipe the door seal. Leave the door ajar between washes so it dries.
Then use less, permanently. Start at half what you have been using and see whether anything actually gets less clean. For most households, it does not.
The simplest fix of all
Use a detergent that cannot be overpoured.
This is the least glamorous argument for laundry detergent sheets, and the most practical one. A sheet is pre-measured. One sheet, one load. There is no cap, no fill line, no judgement call, and no way to accidentally use a third more than intended because the light was bad.
It removes the decision entirely — and the decision was the problem.
Blue Bird sheets come 80 loads to a box, at around 25 cents per load. If your towels do not start absorbing again within a few washes, tell us within 30 days and we will refund you.