Even if the sofa looks clean, it can still be the source of an unpleasant smell. There can be several reasons: spilled drinks, pets, and so on.
But there are several simple options that will help you deal with the problem.
Ventilation and vinegar will help to get rid of the musty smell that may arise if furniture is left in an unheated room for a long time.
In such cases, it is best to leave the furniture in the fresh air for a few hours. If this is not an option, you can leave the windows open in the room and create a draft.
The upholstery should be treated with a solution of vinegar and water in a ratio of 2 to 1.
The vinegar composition will also help in the situation when you need to get rid of the smell of pets. In this case, you need to increase the amount of vinegar (3 to 1).
Once the treated area is dry, apply baking soda and salt.
They need to be removed after a couple of hours.
In addition, you can wipe the upholstery with a mixture of water and lemon juice (2 to 1).