The Hidden Threat in Your Wardrobe

Clothes moths are one of the most costly household pests you may never see coming. Unlike many insects, they shun light and live deep in undisturbed areas — the back of wardrobes, storage boxes, under furniture — quietly destroying your best garments over weeks and months.

The key fact: adult clothes moths don't eat fabric at all. It's the larvae that cause all the damage, feeding on animal-based fibres to obtain the protein keratin.

Which Fabrics Are at Risk?

Clothes moth larvae can only digest keratin, a protein found in animal-derived materials. This means your risk depends entirely on what's in your wardrobe.

High-Risk Materials

  • Wool — the most commonly attacked fabric, including wool carpets and rugs
  • Cashmere — particularly attractive due to its fine fibres
  • Silk — contains sericin protein, which larvae can digest
  • Fur and leather — real animal fur and untreated leather are vulnerable
  • Feathers — down pillows and duvets can be attacked
  • Hair and bristles — including natural-bristle brushes

Lower-Risk Materials

  • Cotton and linen (plant-based — no keratin)
  • Synthetic fabrics like polyester, nylon, acrylic
  • Blended fabrics are at risk if they contain significant animal fibre content

Note: Even "safe" synthetic fabrics can be damaged if they are blended with wool or stained with food, sweat, or skin oils — these organic residues attract larvae.

Signs of a Clothes Moth Infestation

Catching an infestation early significantly reduces damage. Watch out for these warning signs:

  1. Irregular holes in garments — not clean-edged like moth or butterfly damage; they look ragged and random
  2. Silky webbing or tubes — larvae spin these as they feed; look in seams and folds of fabric
  3. Small cream-coloured larvae — up to 1cm long, with a brown head; often found hiding in dark folds
  4. Tiny golden moths — adults seen scuttling (not flying) away from disturbed clothing
  5. Gritty sand-like debris — frass (larval excrement) left behind on shelves or in clothes
  6. Bare patches on wool carpets — especially along edges and under furniture where light doesn't reach

Why Some Garments Are Hit Harder Than Others

Clothes moth larvae prefer items that haven't been cleaned recently. Sweat, food stains, and skin oils provide additional nutrients alongside the keratin. This is why:

  • Unwashed seasonal clothing stored in bags is highly vulnerable
  • Garments at the back of deep wardrobes suffer more
  • Heirlooms and vintage items stored without treatment are frequently damaged

What to Do When You Find Damage

  1. Act immediately — check all nearby garments and items, not just the damaged one
  2. Wash or dry-clean affected items — heat above 50°C kills all life stages; cold below -18°C for 72 hours also works
  3. Vacuum wardrobe thoroughly — including corners, edges, and under drawers
  4. Use pheromone traps — to catch adult males and monitor the extent of infestation
  5. Apply a suitable moth treatment — cedar products, lavender sachets for prevention; insecticidal sprays or professional treatment for active infestations
  6. Store clean garments properly — use airtight bags or sealed containers for long-term storage

The Cost of Doing Nothing

Clothes moths reproduce quickly. A single female can lay up to 200 eggs during her lifespan. Without intervention, a small infestation can become a widespread problem affecting multiple wardrobes, rugs, and upholstered furniture within a single season.

Early detection and consistent prevention are the most cost-effective approaches to protecting your wardrobe and home textiles.