Kneel down and part the pile with your thumbs.
If the tuft is pale all the way from tip to base and the fibre next to it is a normal colour, you have colour loss and no amount of cleaning will touch it. If the pale looks like a film sitting on top of a tuft that’s still coloured underneath, something has been spilled and it can come out. That distinction takes four seconds and it decides everything that follows, including whether you should be ringing a carpet cleaner at all.
Benzoyl peroxide does the first kind of damage. Acne cream, face wash, some spot treatments, a few whitening products – the active ingredient oxidises the dye out of the fibre, and dye that’s gone is gone.
How Do I Tell A Bleach Spot From A Stain Before I Waste A Morning On It?
The pattern usually gives it away before the fibre does.
Benzoyl peroxide arrives on a carpet second-hand. Somebody applies it at night, it transfers to the pillowcase, the pillowcase goes on the floor or gets shaken out over the carpet, and you end up with a scatter of small pale marks on one side of the bed rather than a single spill. I look for a corridor of them between the bed and the door. In a flat in Kingston, KT2, the giveaway was a line of five spots the size of five-pence pieces running from the bedside to the wardrobe, each one slightly fainter than the last, which is a towel being carried rather than a bottle going over.
Colour tells you the fibre. On a mid-brown nylon the loss usually goes orange or salmon, because the brown was built from three dyes and the blue component surrenders first. Wool tends to go yellow-cream. A grey polypropylene goes dead white.
Check the pillowcases and the towels while you’re there. Pale patches on navy bedding in the same household confirms it in ten seconds, and it stops the conversation where the customer insists nobody has spilled anything.
The spots nobody connects to the bathroom
The other version of this job is a trail through the doorway and across the landing, carried on bare feet from a bathroom where somebody rinses a face wash down and drips. A house in Enfield, EN2, had a cream wool twist with forty-odd pinhead marks across two rooms and a fifteen-year-old who denied everything. Same product, same chemistry, distributed by footfall.
Why Does The Spot Keep Growing After It’s Been Cleaned?
Because the oxidiser is still in the fibre and still working.
Benzoyl peroxide doesn’t flash off. It sits in the pile, converts slowly, and keeps stripping colour for weeks after the original contact, which is why customers describe a mark that was the size of a pea in March and a two-pound coin by June. Wet cleaning without neutralising first spreads it outward into the surrounding pile, and I’ve seen a competent cleaner turn six neat spots into six soft-edged halos by doing nothing worse than a normal extraction over the top.
The fix is a reducing agent. Sodium thiosulphate is the one I carry, mixed weak, misted on, left ten minutes and rinsed. It deactivates what’s left so the damage stops where it is.
Neutralise before anything else, including the vacuum
I do this on the first visit even when the customer has only asked for a quote and hasn’t decided about recolouring. It costs me a few minutes and half a litre of solution. It protects the carpet while they think it over, and it means the dye match I mix in three weeks is matching a spot that hasn’t moved since.
Can The Colour Be Put Back In?
On nylon and on wool, yes, and it’s satisfying work.
Both fibres take acid dyes, which is the same family of dye the mill used in the first place. I work from three concentrated primaries plus a black, mixed in a small jar with a drop of acid to help the dye strike. The spot gets dabbed with a small brush or a pipette, worked into the tuft with a fingertip through a glove, blotted with white towelling, then set with a steam iron over a damp cloth for a few seconds.
The whole method rests on one principle: under-dye and go again. A spot that’s a shade too light disappears from three feet away. A spot that’s a shade too dark is a black mark on a beige carpet and it’s permanent, because you can’t take dye back out of nylon without bleaching it again and starting over. Two thin applications beat one confident one every time.
Time between coats matters as much as the mix. I give the first application ten minutes to strike before I judge it, because wet dye in a damp tuft always looks darker than it will once the pile dries, and the number of people who have gone too far on a spot by judging it wet is most of them.
Rate of work is the honest problem. Forty pinhead spots across a landing took me three and a half hours in that Enfield house, and the price reflected it. A single spot by a bed takes fifteen minutes.
Wool needs a lighter hand and more heat to fix. Nylon takes dye greedily, particularly worn nylon in a traffic lane where the fibre has been abraded, so the same mix that’s perfect on a spot under the bed will go too strong on a spot in the doorway. Under-dye and go again.
Polypropylene is the wall you hit. It’s coloured in the melt before the fibre is even extruded, there’s no dye site to work with, and no topical colour will hold on it for more than a few months of vacuuming. Anybody who tells you they’ve dyed a polypropylene carpet has painted it.
Matching a colour that’s already faded
Never match to the carpet under the wardrobe. That’s the original shade and the room is eight years lighter than that now, so a spot matched to the protected carpet stands out as a dark freckle. I match to the pile a foot away from the damage, in the light the room has at the time of day the room gets used, and I check it from standing height rather than from my knees. The customer will look at it standing up for the next decade.
Light is the variable that ruins this. A match made under a bedroom pendant at four in the afternoon in November can read differently in June daylight, and on pale greys with a blue base I now mix, test, and come back rather than finishing in one visit.
When Is A Bonded Plug The Better Answer?
Four situations, and I’ll take the plug over the dye in all of them.
Damage down to the backing, where the bleach has reached the primary and the tuft is white at its root – dye won’t hold on a fibre that’s been chemically stripped that hard. Anything larger than about a two-pound coin on a plain cut pile, where a dyed area will read as a smudge under raking light from a window. Loop pile and heavy texture, because the eye follows the loop and finds the edge of the repair. And polypropylene, always.
The donor comes out of a wardrobe, from under a fitted unit, or from the tail end of a roll if the customer kept one, which about one household in twenty has done. A tubular cutter takes a clean disc, the plug goes in on hot-melt tape with the pile running the same direction as the room, and the edges get teased together with a needle.
Where the donor comes from matters more than the cut
The catch is age. A disc from inside a wardrobe is the colour the carpet was when it was laid, so a perfect mechanical repair can still read as a bright coin on a faded floor. In a bedroom in Uxbridge, UB8, I cut the donor, laid it in, then dyed the plug down by two shades to match the room around it. Belt and braces, and the only way to get it right on a carpet past about five years old.
Is Any Of This Worth Paying A Professional For?
Frequently, no, and I’d rather lose the booking than take eighty quid off somebody for something they can do themselves.
A single small spot on a mid-tone carpet, in a room that isn’t about to be inspected, is a home job. A colour repair kit with three primaries costs around fifteen pounds and does dozens of spots. The technique is the one above – dab, blot, stand up, look, under-dye and go again – and the failure mode for an amateur is going too dark in one hit, which the method protects against.
Where I’d call somebody is a landing full of marks, a pale grey with an awkward undertone, wool that needs heat-setting, a check-out inspection with money riding on it, or anything requiring a plug, because a badly cut plug is worse than the bleach spot was.
The deposit dispute version of this job
A landlord in Hounslow, TW3, asked me to quote on nine spots in a let bedroom so he could deduct it from a deposit. The dye work came to a little over two hundred pounds. He’d have been better off with the kit and an afternoon, and I told him so, and he booked me anyway because he didn’t fancy the afternoon.
The part worth knowing in that situation is that bleach damage from a tenant’s face wash is accidental damage rather than fair wear and tear, and the deduction has to reflect the cost of repair rather than the cost of a new carpet. A two-hundred-pound dye job on a bedroom carpet with four years of life left in it is a defensible figure. A claim for replacing forty square metres is not, and I’ve written the odd letter saying so for tenants as well as landlords.
The pipette, the jar and the four bottles live in a tool tray in the van that also has a spare iron in it, and the iron is the thing I forget most often.