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. **

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 genuine leather shoes that have been ruined with waterproofing spray, you can try using a mixture of mild soap and water to gently scrub the affected areas. You can also use a leather cleaner specifically designed for removing stains and residues from leather. After cleaning, make sure to condition the leather to restore its natural oils and moisture. If the damage is severe, it may be best to seek professional help from a shoe repair specialist. **

The amount of insulation required for a facade renovation depends on various factors such as the climate, building codes, and the existing condition of the building. In general, the insulation should be sufficient to meet the energy efficiency requirements of the building and to improve its thermal performance. It is important to consult with a professional architect or engineer to determine the specific insulation needs for a facade renovation project. **

The roofing underlayment serves as a secondary layer of protection against water infiltration and helps to prevent leaks in the roof. It also provides an additional barrier against wind-driven rain and snow. In terms of insulation, the underlayment can help to improve the overall energy efficiency of the roof by reducing heat loss and preventing drafts. Additionally, it can provide a smooth surface for the installation of the final roofing material, such as shingles or tiles. **

When renovating a roof for thermal insulation, it is recommended to consider adding insulation materials such as fiberglass, cellulose, or foam board. These materials can help reduce heat loss and improve energy efficiency. Additionally, sealing any gaps or cracks in the roof structure can prevent air leakage and further improve insulation. Lastly, installing a reflective roof coating can help reduce heat absorption and keep the interior of the building cooler. **

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. **