The statics of the GermanDomes models are designed for high snow loads (see structural report). The Makrolon surfaces of the domes are smooth, non-porous and do not allow snow to stick. The smooth, spherical, sloping surface means that snow has little chance of settling. Above a certain load, blocks of snow slide down the smooth spherical surface on the outside of the domes. The Makrolon surfaces of GermanDomes domes are non-porous, smooth and easy to clean. The smooth, spherical surface means that snow, dirt and impurities have little chance of settling. Animals and especially birds avoid the smooth, sloping surfaces of the spherical domes. Even for stubborn dirt, rain as a natural cleaning agent or water from a garden hose are usually sufficient. To maintain the brilliance of the material, we recommend liquid, non-scratching care products in combination with soft cotton cloths.