HI-70635L?Cleaning Solution sachets for wine deposits (500ml bottle) is a highly effective cleaning solution, specially formulated for use with pH electrodes coated with wine juice and must deposits. Measuring the pH in wine is critical, indeed the most important step in ensuring the very best quality of the final product. pH affects everything from fermentation to microbial stability and taste. Improper pH measurement can mean readings are up to a 0.5 pH unit off. This variability risks spoilage and other serious quality issues.