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Hi, We have a Worcester Greenstar 24i combi boiler which we think was installed in 2010. After taking a bath, we have noticed there are strange black specks/dots left in the bathtub which when rubbed smudge like mascara. The problem only seems to be in the bathtub and basin in the bathroom and only when the hot water is run. Could this related to a problem with the boiler? Does the boiler need servicing? We've just had a baby who we are bathing in the tub, so we are concerned that the specks could be harmful in someway. Any help much appreciated.
Thanks Dan
Thanks Dan