Many a time, it so happens that you dab one little wet cloth on the wall and the whole thing starts getting little warts. And then you're going to have to repaint it again. Sometimes, if you use something that is a bit too abrasive or acidic, the paint might just come off. These can be avoided with timely cleaning.
Stained walls can never go unnoticed. Usually, stains come right over the most visible parts of the wall. Remember, the older the stains, the more difficult they are to remove. So the best thing to do is to try cleaning them up as soon as possible.
Also use vinegar instead of the dish cleaner. Whatever you use, you have to be a bit soft on the wall. A rough mixture might just rub out the paint from the walls.
✦ These days, most paints have some tenacity to fight water. The use of little water doesn't hurt. But make sure you are using just a 'little'. To ensure that you do not use more water than what is required, use a sponge. By doing so, you can make sure that just enough water is used.
✦ Start scrubbing from the bottom upwards. You may be tempted to go from top to down to avoid the problem of streaks occurring due to cleaning, but the truth is that the streaks are really tough to clean once they get stuck. So start cleaning from the bottom and make sure that you avoid the streaks.
✦ Make sure that the mixture is effective for stain removal. If not, check if it is causing the wall any damage or dryness. You can add a bit more vinegar or dish-cleaning liquid to make the mix a bit stronger and effective.
✦ Once the wall is cleaned, wipe it with a dry cloth. Although most paints these days are water-resistant, do not leave the wall wet.
✦ Lastly, if all of this doesn't work because the stains are too stubborn, use some touch-up paint over the stains. Or better, rearrange the furniture in such a way that the stain is hidden till the next time you decide to paint the walls!
You can see from the above instructions that it is quite easy a task to carry out! To avoid the wall from getting stained again, you can take certain precautions, such as ensuring that the eating tables are not placed too close to the walls (to avoid food and drink spills).
And if you have a fireplace, make sure that you clean the soot at least once in two days during winter. In addition to these measures, make sure you dust the walls regularly too. This will help prevent wall stains.