Musty sofa cushions in Essex: humidity, airflow and drying time

Where the musty smell comes from

A musty odor usually means something stayed damp long enough to go stale or to let mildew get started. On a sofa, the usual causes are:

• cushions pushed against an outside wall that stays cool and damp
• a room with little air movement, like a closed-off sunroom or a basement den
• wet swimsuits, towels or dogs landing on the sofa after an afternoon at Rocky Point Park
• a spill that soaked into a cushion and never dried all the way through

Look closely at the seams, the deck under the seat cushions and the back panel that faces the wall. Small gray, green or black spots are a different problem from a smell, and they change what cleaning can do.

Put a number on the humidity

A room can feel fine and still be damp, so don't guess. An inexpensive hygrometer from a hardware store shows the relative humidity. Set it near the sofa and check it at different times of day for a week or so.

The EPA suggests keeping indoor humidity roughly between 30 and 50 percent. If your readings sit well above that for most of the summer, the sofa isn't the only thing soaking up moisture, and any cleaning will be fighting the room.

Take moisture out of the air

Air conditioning pulls some moisture out as it cools. A dehumidifier does it on purpose. A few habits help either one do its job:

1. Keep windows shut on sticky days. Opening up on a humid afternoon lets wet air in.
2. Close the doors to the room you're drying, so the dehumidifier isn't working on the whole house.
3. Empty the bucket often, or set the unit up to drain on its own if it allows that.
4. Clean the dehumidifier's filter as the manual says. A clogged one works harder and does less.
5. Run the bathroom and kitchen fans when you shower or cook.

Give the furniture room to breathe

A sofa jammed against an exterior wall traps still, damp air behind it. Pull it out a few inches. If it sits in a corner, leave a gap along the side too.

On a dry, breezy day, stand the loose cushions on edge so both faces get air, but keep them out of hours of direct sun, which fades fabric. Resist the urge to unzip the covers and run them through the washer. Those zippers are mostly there so the foam could be put in at the factory. Covers can shrink or fade in the wash and then never fit or match again. Check the cleaning code on the tag instead.

Throws and pet blankets that live on the sofa hold dampness too. Wash them on a regular schedule and let them dry completely before they go back on the cushions.

When cleaning helps, and when it won't

If the smell sits mostly in the fabric and the humidity is under control, a proper upholstery cleaning can make a real difference. The fabric is tested first, then cleaned with a method that suits its cleaning code, and the body oils and soil that hang on to odor come out with it.

It's a different story if mold is growing on the fabric or the frame, or if the cushion cores smell musty all the way through. Cleaning the fabric won't fix foam that has been absorbing damp air for years. An upholsterer can usually replace cushion foam, and that may be the better use of your money. If there's mold on the frame, find out why that room stays so damp before spending anything on the sofa.

Summer cleanings dry more slowly

Anything we clean has to dry, and humid air slows that down. Upholstery that dries comfortably on a crisp October day can take noticeably longer during an Essex July, especially in a closed room.

Before we arrive, start the air conditioning or dehumidifier in that room, and keep it running afterward. A fan moving air across the room helps as well, as long as it isn't pulling in muggy air through an open window. Leave the cushions off the frame until they feel dry all the way through, not just on the surface. Keep pets off. And if you can, don't book the day before you need the sofa for company.

Booking a sofa cleaning

See upholstery cleaning in Essex for what's included. A sofa is $150, a sectional $275, a chair $65 and an ottoman $50. The visit minimum in Essex is $300, so a single sofa on its own won't reach it, and it's worth adding the chairs, ottoman or anything else in that room. If you'd like to describe the smell and the room first, contact us.