Niffless is a concentrated biological product formulated with the specific aim of removing marks and stains which can form on the ceramic part of urinals and toilets, eliminating the odours which normally accompany them. It contains a mixture of micro-organisms in a liquid formula which have been selected for their ability to grow and produce a large quantity of enzymes which contribute to eliminating the organic waste substances. The product also contains a surfactant mixture able to reinforce the cleaning effect of the product and penetrate tough surface stains. The combination of micro-organisms which produces enzymes and surfactants allows the formula to provide exceptional results. It can be used as a detergent on all washable surfaces as the elements favour dissolution of uric acid crystals without having to resort to abrasive acids. The product must be diluted to 10 - 20% with cold water before use. The product's ingredients are completely biodegradable and therefore do not interfere with the flow.