I'd contact the manufacturer of the cloth
If you're not sure who that is, you might try contacting the "e-cloth" people.
E-cloth
EnviroProducts Ltd
East Barn, Furnace Farm,
Furnace Lane, Lamberhurst
Kent
TN3 8LE
Tel. 01892 893131
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In the U.S.
TADgreen Inc.
P.O. Box 812
Greenland, NH...