Cleaning frequency depends on the environment in which the fixture operates: damp, smoky or particularly dirty surrounding can cause greater accumulation of dirt on the unit’s optics. Clean with soft cloth using normal glass cleaning fluid. - Always dry the parts carefully. - Clean the external optics at least every 20 days. Clean the internal optics at least every 30/60 days. FCQ (Fog Cleaner Quart) was specifically developed by Chauvet to clean your Hurricane™ 1100. Make sure you use FCQ regul