
These pictures show the feet of the lander have no dust on them. Why is this?
Well think for a moment; how could the dust be above the lander feet to settle on it? Any blast from the lander’s rocket would throw the dust down and to the side,very little would land on the feet. There is no air disturbance for the dust to billow around in.
Throw the dust to the side and it will go that way, it won’t come back to land on the feet.
ALSO… on the earlier Surveyor unmanned landing missions, there was very little dust on the pads… and not one said a thing.

Pictures transmitted from the Lunar surface of the Surveyor foot pads show that — just as in the Apollo case — there is little or dust build up on the footpads. In fact, only when the Surveyors were commanded to “hop” on the Lunar surface by briefly firing their main thrusters did any significant amount of dust build up on the footpads.

What these images seem to indicate is that it is entirely reasonable — if not normal — for there to be little or no dust build up on the footpads.