slowmotion
Quite dreadful
Sand will knacker the bearings really quickly, so don't be tempted to ignore it. You could try a vacuum cleaner to start with. If you took it to your local friendly garage, they might be persuaded to blow it out with their compressed air line. To do it properly, you might have to take the casing off.Mine is huge, it's just a leaky delapidated concrete prefab with an asbestos roof, so ain't really any good.
On a slightly related note by the way, does anybody know the best way to get children's play sand out of a cordless screwdriver?