Yes, you can use your old black fiberglass tissues to make cleaning cloths or wipes. Fiberglass tissues are durable and can effectively pick up dirt and grime. However, it's important to ensure that the tissues are clean and free from any contaminants before repurposing. Cut them into desired sizes and use them for general cleaning tasks. Be cautious with the edges as fiberglass can be sharp. Always handle with care and consider wearing gloves to avoid irritation or injury.