Yes, clean refers to the state of being free from dirt, marks, or unwanted substances. It can also refer to being morally upright or free from impurities. Keeping things clean is important for maintaining hygiene and a healthy environment. **

Cleaning the wall itself is not harmful to health, as long as you use safe cleaning products and proper ventilation. However, if the wall has mold or mildew, it's important to take precautions as exposure to mold can be harmful to health. In this case, it's best to wear protective gear such as gloves and a mask, and use appropriate cleaning products to remove the mold safely. Overall, cleaning the wall can be done safely as long as proper precautions are taken. **

To clean with Mr. Clean, you can dilute the Mr. Clean Multi-Surface Cleaner in water according to the instructions on the bottle. Use a sponge or cloth to apply the solution to the surface you want to clean. Scrub the surface gently and then rinse with water. For tough stains, you can apply the Mr. Clean Magic Eraser directly to the stain and scrub until it disappears. **

The cleanliness of the apartment depends on the specific circumstances. If the apartment has been recently cleaned and maintained, it could be considered clean. However, if it has not been cleaned or has visible dirt and clutter, it would be considered not clean. It's important to assess the current state of the apartment to determine its cleanliness. **

Rainwater is generally considered clean as it falls from the sky, but it can pick up pollutants and contaminants as it travels through the atmosphere and lands on surfaces like rooftops. It can pick up pollutants such as dust, dirt, bird droppings, and chemicals from air pollution. Therefore, it is recommended to treat or filter rainwater before consumption to ensure it is safe for drinking or other uses. **

Drugstores are generally clean and well-maintained, as they are required to adhere to strict cleanliness and sanitation standards set by health regulations. Most drugstores have regular cleaning schedules and protocols in place to ensure that the store, including the pharmacy area, is kept clean and free from contamination. However, cleanliness can vary from one drugstore to another, so it's always a good idea to observe the store's cleanliness and hygiene practices before making a purchase. **

To keep glasses clean with permanently clean lenses, it is important to regularly clean them with a microfiber cloth to remove any dust or debris. Additionally, using a gentle lens cleaner specifically designed for glasses can help maintain the cleanliness of the lenses. Avoid touching the lenses with your fingers to prevent smudges, and store your glasses in a protective case when not in use to prevent scratches. Regular maintenance and care will help keep your glasses clean and your lenses clear. **

To keep glasses with permanently clean lenses, it is important to regularly clean them with a microfiber cloth to remove any smudges or dirt. Avoid using harsh chemicals or rough materials that can scratch the lenses. Store the glasses in a protective case when not in use to prevent dust and debris from accumulating on the lenses. Additionally, avoid placing the glasses on top of your head or hanging them from your shirt collar to prevent oils and dirt from transferring onto the lenses. **