Why do some sellers recommend washing the suction cup with warm water before installation?
This recommendation is to remove dust particles and initial soft surface layers. During the manufacturing process, a very thin layer of lubricants or dust may remain on the contact surface, which can slightly reduce initial adhesion.
Washing the suction cup with warm water (approximately 40 to 50 degrees Celsius) and drying it with a soft cloth removes these unwanted layers and cleans the contact surface, preparing it for a complete vacuum seal. This method increases adhesion by 30–40% and is especially recommended in highly sensitive conditions, such as installing dashboard cameras or commercial signs.
At Zistoo Engineering Company, we include a simple instruction booklet containing this essential tip with every package. These small details enhance the user experience and strengthen customer trust in sensitive markets like Europe and Canada.
