Tyne And Wear, United Kingdom
I have some sort of insect in my garden, which is leaving black spots all over my Indian stone patio plus all stone ornaments etc. But it is not effecting brick walls or block paving. I have tried several times to jet wash but this does not work. I am presuming that it is an insect. Could anyone help me please as it is getting worse. Thanks.
- 13 Dec, 2011