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. **

There are several ways to raise money for the graduation fund. One option is to organize fundraising events such as bake sales, car washes, or silent auctions. Another idea is to reach out to local businesses for sponsorships or donations. Additionally, creating a crowdfunding campaign online can help gather contributions from a wider audience. Lastly, encouraging students and their families to contribute through direct donations or selling merchandise can also help raise funds for the graduation fund. **

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. **

To clean the back wall of the aquarium, you can use an algae scraper or a magnetic algae cleaner to remove any algae or debris. Simply run the scraper or cleaner along the back wall to dislodge and remove any buildup. If the algae is particularly stubborn, you can use a soft-bristled brush or sponge to gently scrub the back wall. It's important to use only aquarium-safe cleaning tools and avoid using any harsh chemicals that could harm the fish or the water quality. **

To clean the back of a Billy shelf, you can start by removing all items from the shelf to have better access. Then, use a vacuum cleaner with a brush attachment to remove any dust or debris. If the back of the shelf is still dirty, you can use a damp cloth or sponge with a mild cleaning solution to wipe it down. Make sure to dry the back of the shelf thoroughly to prevent any damage to the material. **

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. **