in order to clean a dirty wall without painting it, you can use the following steps:
1. Gather your materials. You will need a bucket of warm water, a sponge or cloth, a mild detergent, and a vacuum cleaner.
2. Mix the detergent solution. Add a few drops of mild detergent to the bucket of warm water. Stir the solution until the detergent is dissolved.
3. Dampen the sponge or cloth. Dip the sponge or cloth into the detergent solution. Wring out the excess water.
4. Wipe down the wall. Use the sponge or cloth to wipe down the wall in a circular motion. Be sure to get into all the nooks and crannies.
5. Rinse the wall. Once you have wiped down the wall, rinse it with clean water. Use a sponge or cloth to wipe down the wall with clean water. Wring out the excess water.
6. Vacuum the wall. Use a vacuum cleaner to vacuum up any remaining dirt or dust.
7. Allow the wall to dry. Open the windows and doors to allow the wall to dry completely.