the ecogurus - highest strength! - natural apple vinegar based hard water cleaner! - clean hard water, lime, bathroom, shower, sink, bath, tiles, toilet, windows, calcium, rust and more! the ecogurus it is perfect as a hard water cleaner, bathroom cleaner spray, shower spray, bath cleaner, mirror & window cleaner, shower glass cleaner, shower screen cleaner, bathroom tile cleaner, bathroom spray, shower door cleaner, kitchen cleaner, work surface spray. removes tough water stains, hard water, lime, calcium, rust, soap stain, urine!