This is just unbelievable, but not really in fact: I spend a week photographing kite surfers on the very windy beach of Fuerteventura (Canary Islands - SP); despite extreme precautions (plastic bags etc); wet cleaning of the equipment after each daily session etc.; I found sand particles six months later. As none of the equipment have been opened / lenses been replaced during the shooting sessions, I don't believe many sand particles went in i.e. I haven't noticed but I didn't proceed to any dismantling neither.