In the first years after the purchase, the care of the painting is reduced to shaking off the dust with light mops (sponges). This can be done quarterly or every six months as part of a regular cleaning.
After 5 years, depending on the condition of the painting, it is advisable to clean it with a sponge slightly moistened with warm water. Do not use surface cleaners, dish detergents or other aggressive liquids.
Once every 10 years, you can add a little neutral soap to the water, and again, do not wash the picture, but clean the paint with light touches of a soft sponge dipped (and wrung out) in soapy water. Dirt stains can be cleaned with a cotton swab dipped in soapy water (but do not apply too much pressure).
Despite the durability of paints, do not hang the painting in a place where direct sunlight is constantly falling.
Do not touch the paint layer with bare hands, always hold the painting only by the frame. Otherwise, in the places where the paints come into contact with the skin, dirty spots may form over time. There is always a layer of fat on the skin, which will remain in the picture and collect dust.
Do not store paintings in unheated garages and basements. At the same time, it is possible to leave a painting in an unheated wooden house, since it is usually not very humid there, the wood of the walls absorbs moisture well.
If the canvas sags relative to the frame, give the painting to the workshop for hauling. This is an inexpensive procedure, the skilled hands of the master will restore the original tension of the canvas.