It is generally not recommended to clean old silver coins before selling them. Cleaning can potentially damage the coin's surface and reduce its value to collectors. Collectors often prefer coins in their original condition, including any patina or toning that has developed over time. It is best to consult with a professional coin dealer or numismatist before attempting to clean or sell old silver coins. **

Eurocent coins can be best cleaned and polished by using a mild soap and warm water to gently wash the coins. After washing, they should be patted dry with a soft cloth to avoid scratching the surface. For polishing, a non-abrasive metal polish or a silver polishing cloth can be used to gently buff the coins in a circular motion. It's important to avoid using harsh chemicals or abrasive materials, as they can damage the coins. **

It is generally not recommended to clean old silver coins before selling them. Cleaning can potentially damage the coin's surface and reduce its value to collectors. Collectors prefer coins in their original condition, including any patina or toning that may have developed over time. It is best to leave the cleaning to professionals if necessary, and always consult with a coin expert before attempting any cleaning. **

Old coins like Reichsmark and Reichspfennig should be cleaned very carefully to avoid damaging their value. One method is to gently soak the coins in a solution of warm water and mild dish soap, then use a soft toothbrush to gently remove any dirt or debris. It's important to never use harsh chemicals or abrasive materials, as this can cause irreversible damage to the coins. If the coins are very dirty or tarnished, it's best to consult a professional coin dealer or conservator for advice on safe cleaning methods. **

Yes, prison cells are cleaned regularly by inmates or prison staff. Cleaning schedules vary depending on the facility, but generally, cells are cleaned at least once a day. Inmates are usually responsible for keeping their own cells clean, but prison staff may also conduct more thorough cleanings on a regular basis. Maintaining cleanliness in prison cells is important for hygiene, health, and overall well-being of the inmates. **

Basketballs are typically cleaned by wiping them down with a damp cloth to remove dirt and grime. For more thorough cleaning, a mild soap and water solution can be used to scrub the surface of the basketball. It is important to avoid using harsh chemicals or abrasive materials that could damage the ball's surface. After cleaning, the basketball should be thoroughly dried before being used again. **

Schools are typically cleaned by custodial staff who are responsible for maintaining the cleanliness and hygiene of the school facilities. They use a variety of cleaning tools and products to clean and disinfect classrooms, hallways, restrooms, and other common areas. This includes vacuuming, mopping, dusting, and sanitizing surfaces to ensure a clean and safe environment for students and staff. Additionally, some schools may also hire professional cleaning services to deep clean and sanitize the school on a regular basis. **

It is generally better not to clean very old coins. Cleaning can potentially damage the coin's surface and remove its natural patina, which can decrease its value to collectors. Additionally, improper cleaning techniques can leave scratches or other marks on the coin, further reducing its value. It is best to leave old coins in their original condition and seek the advice of a professional if cleaning is necessary. **