just ladder + stand off £20, 1 large washing up pad soapy water, bucket on a pound shop bendy cable,hook bucket on bendy ties, away you go. mostly its only dirty algie, just washes off ,use scrubber side to loosen off, smooth side to wipe down, i only use pole if no easy safe access., i could do these all day. so easy. ladder stand off is a must for your own safety, if you fall you may not get back up , easy to be parralised from a fall. live to clean another day.