The exterior windows of our house contain heavy water spots (see before/after photos). Automotive wheel cleaning acid (5-10% hydrofluoric acid) worked perfectly to remove the spots but I am interested a less expensive solution. To be honest, I was quite blown away by how quickly and effectively wheel acid worked.
Someone suggested a bronze wool pad. Others suggested using the “Bio-Clean Hard Water Stain Remover.” What do you use?
Someone suggested a bronze wool pad. Others suggested using the “Bio-Clean Hard Water Stain Remover.” What do you use?