We got new sofas around December time. Initially we flipped the cushions weekly but we have been lax recently and it has maybe been a month or more since we flipped them.
Flipped them today and noticed that the cushions themselves all smell really foisty. The foam inside the cushions doesn't smell and isn't mouldy. The part of the sofa the cushions sit on also smell foisty. There's no sign of mould or anything anywhere else in the room. We flipped the sofas over and unzipped them at the bottom. Inside the sofa also smells foisty but again no sign of mould.
What could be causing this and how can I get rid of this horrible smell? We have sprinkled baking soda over the cushions which worked initially but the smell came back the next day.