Based on general cleaning expertise, as the provided context does not contain specific instructions, whether you can wash your sofa cushions in a machine depends on several factors.
The most critical step is to check the care tag on your cushions. Manufacturers include a cleaning code that tells you the safest way to clean the fabric. A 'W' code means the fabric can be cleaned with water, making the covers potentially machine-washable. An 'S' code means it requires a solvent-based, water-free cleaner, so you should not use a washing machine. A 'W/S' code indicates either method is safe, while an 'X' means you should only vacuum or brush the fabric.
These cleaning codes apply specifically to the cushion covers, not the foam or fiberfill inserts. Even if the covers are machine-washable (Code 'W'), you should almost never put the inner cushion inserts in the washing machine. The agitation can damage the filling, causing it to become lumpy or misshapen. Furthermore, foam inserts absorb a large amount of water, are difficult to dry completely, and can develop mold or mildew.
If your cushion covers are removable and have a 'W' on the tag, you can likely wash them. For best results, zip the covers closed, wash them on a delicate cycle with cold water and a mild detergent. It is wise to wash all the covers at the same time to maintain a uniform color. To prevent shrinking, it is safest to air-dry the covers by laying them flat or hanging them. If you use a machine dryer, select a no-heat or very low-heat setting.
