Wind farms are exposed to the weather 24/7 on 365 days a year. Besides technical malfunctions, weather-related wear and tear also impairs the functionality of wind turbines. Rotor blades, for example, which are exposed to rain, hail, ice and lightning, must be serviced regularly. Even without damage or erosion, deposits on the blades can impair aerodynamic efficiency. Studies have shown that blade roughness reduces wind turbine performance by up to 25%. Only continuous technical management and timely maintenance activities will help to avoid this scenario.