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Most damage to a wool sweater does not happen while it is being worn. It happens during the long stretch of storage between seasons, when it is hanging on a hook that pulls the shoulders out of shape, or sitting untouched in a closet where moths can work through it undisturbed. Wear is honest damage you can see coming. Storage damage shows up months later, when the sweater no longer fits the way it used to and you cannot quite say why.
Never hang a wool sweater
This is the single most common mistake, and it is almost always done out of habit rather than ignorance. Hanging a sweater on a hanger puts the entire weight of the garment on two small points at the shoulders. Wool has some elasticity, but it does not spring back from sustained weight the way it recovers from a single stretch. Leave a heavy sweater on a hanger for a season and you will find hanger bumps at the shoulders and a body that has crept several inches longer than it started.
Wool should be folded, always. Lay it flat, fold the sleeves in across the chest, then fold the body in thirds or in half depending on the drawer or shelf it is going into. If you need to hang something briefly, drape it over a padded hanger or over a closet rod folded in half, never on a pointed hook.
Clean before you store, every time
This is the step people skip because the sweater does not look dirty, and it is the step that invites moths. Moth larvae do not eat clean wool efficiently. What draws them is the residue left behind: body oils, sweat, food spills, perfume. A sweater that looks perfectly fine to the eye can carry enough invisible residue to be a target, while a freshly washed one sitting right next to it is far less appealing.
Hand wash or use a gentle wool cycle with a wool-specific detergent before folding anything away for the season. Lay it flat on a towel to dry, reshaping it gently while damp, and never wring it. Twisting wet wool distorts the fibers and can leave a permanent kink in the shape.
Where and how to store it
Cotton or breathable storage bags are far better than sealed plastic. Wool needs to breathe, and trapped humidity inside a sealed plastic bin is an invitation for both mildew and the kind of musty smell that lingers long after you take the sweater back out. A cotton garment bag, a breathable box, or even a clean pillowcase does the job without suffocating the fibers.
Cedar blocks or lavender sachets are worth including, not because they kill moths but because they discourage them from landing in the first place. Replace cedar blocks every few months, since the scent fades and with it the deterrent effect. These are a supplement to cleanliness, not a substitute for it. A dirty sweater surrounded by cedar will still attract moths eventually.
If you only do one thing differently this year, wash before you store. Almost every moth hole traced back far enough starts with a sweater put away unwashed.
Dealing with pilling
Pilling is not a sign of a cheap sweater or careless storage, it is friction, plain and simple. Anywhere wool rubs against itself or against a bag strap, chair arm, or seatbelt, fibers work loose and tangle into small balls. A sweater kept folded and cushioned in storage pills far less than one crammed against other garments.
To remove pills that have already formed, use a fabric comb or a sweater stone, working in one direction with light pressure rather than scrubbing back and forth. A pilled sweater is not ruined. It just needs ten minutes of attention before it goes back into rotation.
Fixing a small hole before it becomes a big one
Wool unravels from a small snag or hole faster than most fabrics because the fibers are loosely spun compared to cotton. Catch it early. A small moth hole or snag can be closed with a simple darning technique: weave a needle and matching wool thread back and forth across the gap in a loose grid, building a small patch of new fabric over the hole. It does not need to be invisible to work. A slightly visible darn on the inside seam or underarm is a far better outcome than a hole that grows every time the sweater is worn.
For a hole in a visible spot, or in a sweater with sentimental or real value, this is where it is worth finding someone who mends professionally rather than attempting it yourself for the first time on the piece you care about most. A local tailor or dry cleaner that offers mending can usually reweave a hole so it is nearly invisible, for a modest fee that is almost always worth it compared to replacing the sweater.
The habit that matters most
Check stored sweaters once mid-season, not just at the start and end. Unfold them, shake them out, refold them. This single habit interrupts moth larvae before they do real damage and lets you catch a small problem, a pulled thread, an early hole, while it is still an easy fix rather than a lost garment.
