Our FLIP 5 speaker is an "All-weather companion," and sometimes it can get dirt and other substances on it. Clean your speaker under lukewarm water from your water tap, and use a microfiber cloth to remove stains. Do not use any alcohol or other to remove stains and dirt. Do not charge your product while the charging port is wet; make sure it is dry before you connect it to a charger. Contact our Customer support if you need more advice.