Wall Cleaning
Yep, they need cleaning too even with those glossy finishes that gives them a long lasting coat with nice sheen for many years. Internally painted surfaces such as walls normally last anywhere from five to ten years if they do not suffer greatly from dirt and grime. These walls especially glossy ones can be cleaned with a mild soap solution and a rag, being sure to test out in an inconspicuous space before doing the whole wall so you see if it affects or absorbs into the paint. Flat and semi-glossy walls are harder to deal with, they are preferred by most for they tend to be softer on the eyes, reflecting only indirect light rather than harsh glare that can be quite tiresome to the eyes. They are however a bit harder to clean with only some dusting possible for it tends to absorb water readily due to the flat surface of the paint. A fresh coat of new generation low-odor and easy to clean paint may help with cleaning a lot in the future, they also tend to last longer due to better chemical composition with non-polluting ingredients.