IvegotsTILE

How much is that residue remover Gaz?Could do with some cause the last job I was on they made me leave before I was quite finished using my washboy on Porcelain tiles and now when I've gone round to do the spashback theres a constant film of grey grout on the tiles straight after the floors been cleaned.(Needed a final wipe over but they were late to go out)There not that bothered but I think it looks awful.