Please write a comprehensive guide that includes step-by-step instructions on how to properly sanitize, use, and store a derma-roller to ensure effective results and reduce the risk of infection or damage to the skin. Include information on recommended techniques, frequency of use, suitable skincare products, and troubleshooting tips for common issues. The guide should be written in an easy-to-understand language, with clear headings, relevant images, and sources cited where necessary.
This prompt doesn't seem malicious.