Re: Cleaning Speaker Cloth
Looking at pictures of the U245 it looks like one of those plastic woven cloths often found on Bush sets of the same time. These do clean up quite easily with a gentle brush from a toothbrush and a watered down mild cleaner, periodically moped up with sheets of kitchen roll. But if it's made from anything else I'd be inclined leave it be, you could make it look worse.
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