Fabric chairs can become mouldy, especially when outdoors and in damp conditions. Mould spores thrive in moist conditions, and fabric chairs can be an ideal place for them to grow. Mould can cause staining and odours on your furniture and ruin their appearance. If your furniture upholstery isn't removable and machine washable, it can still be cleaned using common household cleaners. With the proper technique, you can remove the mould and restore the appearance of your fabric chairs.
Place the fabric chairs or cushions in the sunlight to dry them completely.
Brush the fabric with a soft-bristled brush to remove any loose mould spores. Brush using straight strokes away from your body to avoid inhaling the spores. Do this brushing outside.
Apply all-fabric bleach to the mould or mildew stains. Either pour it directly onto the stains, or apply it to a cloth and dab it onto the fabric. Allow it to sit on the fabric for five minutes.
Mix equal parts mild washing powder and warm water in a bowl using a spoon. Stir it vigorously to create soap suds.
Dip a damp cloth into the suds, and wipe the fabric thoroughly to remove any remaining mould.
Dampen a cloth with warm water, and wring it out. Wipe the fabric to remove the soap suds and bleach. Rinse the cloth and wipe the fabric until all of the residue is gone.
Air dry the fabric chairs completely in the sunlight, or place in a well-ventilated area.