It's had a wash, isn't that good enough?A few weeks ago one of the other unit holders moved out, and dumped a load of stuff in his skip. I had a dig around as you do, and there was a plastic box full of water with some power tools. I dug this out:
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thinking that at worst it might donate the mains flex as the one on my die grinder is breaking up around the end of the strain relief. I left it to dry out, and yesterday I tried it and it works just fine. I might take it to bits and clean it out before using it,