The wool blazer arrived from Vinted looking perfect, folded in tissue with a note from the seller. Three weeks later, a small, neat hole had appeared on the lapel. It hadn’t been there when I first tried it on. Nobody had snagged it. Something had eaten it.
Preloved pieces are some of the best things in my wardrobe, from a retro striped trouser suit to cashmere jumpers bought for a fraction of their original price. The natural fibres that make vintage clothes worth buying also make them food. So before another wool coat goes on the rail, learn what’s coming for it.
Clothes moths and carpet beetles go after keratin, the protein in animal fibres. The larvae do the chewing, not the adults. One secondhand jumper carrying a few eggs can quietly start a problem in a closet full of clean clothes.
Carpet beetles are the sneakier of the two. Their shed skins, or husks, look like tiny brown shells, and the larvae feed happily in rugs, lint under skirting boards and dust behind radiators long before they reach your knitwear. That’s why professional treatment, whether through Bethesda pest control or a service near you, covers the whole house rather than just the closet where you spotted damage.
Moths are pickier eaters. Here’s what they go for, and how fast.
| What to know | The detail |
|---|---|
| Main clothes moth species in the UK | 2: the webbing clothes moth and the case-bearing clothes moth |
| Most common species | The webbing clothes moth, with numbers rising sharply in recent years |
| Speed of damage | Can eat through centuries-old fabric within several months |
| Lifespan of lavender and cedar repellents | About 3 months before they need replacing |
| Fibers most at risk | Wool (especially cashmere), fur, feathers and untanned skins |
According to English-heritage, monitoring at historic properties shows clothes moth numbers climbing, and the insects can chew through fabrics hundreds of years old in a matter of months. If they can do that to a museum wall hanging, a 1970s wool suit left alone doesn’t stand much chance.
Moths hate light, movement and clean fabric. They love a dark, undisturbed corner, and they love the jumper you wore once to dinner and hung straight back up with a faint trace of perfume and skin oil on it. Body oils and food spills are what draw them in. Worn “only once” still means dirty.
Most of the fix is routine. After wearing a wool coat, shake it out and brush it, paying attention to the collar and cuffs. Every few weeks, slide the hangers along the rail and check the back of the closet. That’s where forgotten pieces hang undisturbed.
Vacuum the closet floor and corners, not just the bedroom carpet. Get into the gap where shelves meet the wall: that strip of fluff is exactly where carpet beetle larvae settle.
Quarantine every new arrival. Anything secondhand in wool, silk or fur should be washed, dry cleaned or frozen before it joins the rest of your clothes. Seal it in a bag and leave it in the freezer for a week to kill any eggs you can’t see.
Most damage happens over the change of seasons. Moths don’t get busier; heavy knits simply sit untouched for six months. Before you pack away winter pieces, run through this routine:
Skip plastic dry-cleaning bags for long-term storage; they trap moisture. Breathable fabric bags, zipped fully closed, work better for suits and tailored coats. A piece you can never replace, like a hand-knitted cardigan, gets a bag to itself.
Cedar and lavender smell lovely, but they’re backup. They lose strength fast, and they do nothing for an item already carrying eggs.
The earlier you catch it, the less you lose. Look for small, irregular holes in knitwear, thinning patches on wool suits and silky webbing tucked into seams or under collars. Case-bearing moth larvae leave tiny tube-shaped cases, often the same colour as the fabric they’ve been eating.
Small beige moths in a dark closet are another giveaway. Clothes moths tend to scuttle or hide rather than fly toward a lamp. If you see one run into a fold of fabric, take it seriously.
If it’s one jumper, isolate it, freeze or wash it, and vacuum the whole closet thoroughly. Then hang pheromone traps inside the wardrobe and check them weekly for about a month to see whether adults are still around.
Brown husks on windowsills, larvae in the rug, fresh holes in different rooms: at that point it’s no longer a wardrobe problem. Book a professional inspection before it reaches the rest of your knitwear.
This weekend, pull out the three wool or cashmere pieces you wear least. Check the seams under good light, then vacuum the corner where they’ve been hanging. It takes twenty minutes, and it’s the habit most likely to keep your favourite finds wearable for years.