I just went on a short trip and during this trip, while walking up a cliff, I slid on the loose sand/dirt and fell to the ground, kicking up a lot of this sand/dirt. Some of the sand sprayed onto my camera, which I was holding in my hand. Unfortunately, I didn't know this until later. The sand coated the retracting lens while it was fully extended, and when I turned off the camera, the sand went into the body of the camera. Now the lens does not extend or retract properly, often resulting in a "system error". At times, I've had to gently forcibly push or pull the lens out, when turning it on and off several times doesn't work. Does anyone know what I should do? I've wiped off the exterior of the lens. Is it okay to use a blower brush (only the one I have doesn't have the brush, only the blowing part -- what are these things called anyways?) or would that just make it worse?
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