Curtain Cleaning Guide: Remove Dust, Mould and Allergens

Curtains hang quietly in the background of your home, collecting dust, cooking fumes, pet hair and moisture every day. If anyone in your household sneezes through the night or you notice a musty smell near the windows, curtain cleaning might be the overlooked fix.

This guide explains why curtains get dirty, what you can safely do yourself, when to call a professional, and how to choose a cleaner who will not shrink or ruin your favourite fabrics.

Why curtains need cleaning

Curtains act like giant filters. They catch dust, pollen, smoke, skin flakes and grease from the air, and they sit right where condensation forms on windows. In humid or poorly ventilated rooms, that moisture can encourage mould to grow, especially on the lower edges and behind the fabric.

For people with allergies or asthma, dirty soft furnishings can add to the irritants in a room. Regular cleaning will not cure a medical condition, but it can make a bedroom noticeably more comfortable. If symptoms are persistent, talk to your doctor.

How often should you clean them?

There is no single rule, because it depends on your home. As a rough guide, a light dusting or vacuum every week or two keeps buildup down, while a deeper clean is worth considering about once a year. Clean more often if you live near a busy road or building site, have pets, smoke indoors, cook with a lot of oil or have anyone with allergies at home.

What you can do at home

Check the care label first

Before doing anything, find the care label. Some curtains can be machine washed, some are dry clean only and some, like many lined, heavy or velvet curtains, can be damaged by water. If there is no label or you are unsure, test a hidden corner or ask a professional.

Quick maintenance steps

1. Take the curtains down and shake them outside to remove loose dust.
2. Use the soft brush attachment on a vacuum, working from the top to the bottom.
3. Remove hooks and any detachable weights or linings.
4. If the label allows, wash on a gentle cycle with cool water and mild detergent, with the machine only partly full.
5. Air dry or follow the label's drying advice, then rehang while slightly damp so creases fall out.

Avoid hot washes and high heat unless the label says they are safe. Heat is the usual cause of shrinkage.

Dealing with mould

Small spots of surface mould on washable fabric can sometimes be treated by washing as the label allows and drying thoroughly in fresh air. Deep or widespread mould is a different matter. It often points to a moisture problem in the room, so fix ventilation, leaks and condensation too. If mould keeps coming back, speak with a professional.

When to call a professional

A specialist is worth the cost when curtains are large, lined, delicate or expensive, or when they are hard to remove. Many companies offer on-site cleaning, so curtains stay hanging while they are steam cleaned or treated. Others take them away to be cleaned, then rehang them.

• Heavy, lined or blockout curtains that cannot go in a washing machine
• Delicate fabrics such as silk, velvet or fabrics with trims
• Tall or hard-to-reach windows
• Persistent smoke, pet or mould odours
• Curtains with dry clean only labels

How to choose a curtain cleaner

Ask the cleaner what method they would use for your specific fabric and why. Good professionals will want to inspect the curtains or see photos and the care label before quoting.

1. Is the cleaning done on site or off site?
2. Do you test for colour fastness and shrinkage?
3. What products do you use, and are they suitable for allergy-prone households?
4. Are you insured, and what happens if my curtains are damaged?
5. Is the quote per panel, per metre or per window, and does it include rehanging?
6. How long will the curtains take to dry before I can close them?

Beware of cleaners who promise to fix everything without inspecting the fabric, and of unusually cheap quotes that may not include rehanging or treatment of tough areas. Prices vary by fabric, size and location, so get a written quote.

Key takeaways

• Vacuum curtains regularly and deep clean about once a year, or more often if needed.
• Always check the care label before washing.
• Fix moisture and ventilation to stop mould returning.
• Use a professional for lined, delicate or heavy curtains.
• Ask about methods, insurance and rehanging before booking.