As an idea, may help, may not but shouldn't hurt either way. I'd try spraying washing up liquid on it. like you do with crops etc. Good Luck!
Recently bought compost bin from council run organisation, they have loads of composting tips available. Their website address is...
I was going to suggest the same as Dendrobium, Just remember with persistance you can change or improve soil. If you fancy planting acid-loving...
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