HG window cleaner exceeds all professional requirements, because it is pH neutral, so it will not harm paint, varnish or plastics and is also very gentle for your skin. This window cleaner is very economical to use, one 500 ml bottle is sufficient for at least 35 window washes. Add 15 ml of the window cleaner to half a bucket of lukewarm water. For the best results, wash the window in a circular movement. When drying the window, use a squeegee in overlapping strips and always dry the squeegee with a cloth before applying it to the window for the next stroke. Never wash the windows in direct sunlight. It does not contain ammonia or methylated spirits, making it a safe choice for your home. The 500ml size is convenient for storing and using.