No, it is not necessary. If you haven't applied any water-repellent substance or wax products onto the glass, you can use KIMBLADE wipers without removing any oil film. However, we recommend removing it before using the wiper for maximum performance.
As it is a functional wiper made out of 100% silicon, please keep these tips in mind if you wish to enjoy the optimum performance:
Be careful not to drop the wiper arm when replacing it, as the fall may crack the windscreen.
Wear gloves when replacing the wiper to prevent injuries.
Use a soft cloth to remove hardened foreign substances, such as a sticker, resin, bird feces, or sharp frost, instead of using the wiper.
Using the wiper to remove them may scratch the silicon blade, causing it to have stripes.
Do not apply water-repellent coating substances (wax, water-repellent coating washer fluids, and others), chemicals, films, etc., on the glass.
Doing this may cause the wiper to create noise or rattling sounds.
Clear off dust or sand granules accumulated upon the blade with wet tissues or a soft cloth when the wiping performance gets considerably weakened. If such an action does not have considerable effect, operate the wiper to apply automatic water-repellent coating substances.
While the hydrophilic property gets the glass wet by spreading water drops on it, water-repellency gathers water drops like a lotus leaf by preventing the glass from dispersing water drops. Even if the glass surface with hydrophilic substances applied has a clear and vivid view when the wiper operates, it gets distorted - as raindrops refract light when they gather on the glass again. Furthermore, an oil film is formed due to many oil substances on roads, making the glass partially wet and appear dirty.
Meanwhile, glass with water-repellent coating doesn’t gather water drops, making it look frosted due to tiny water drops right after the glass is wiped. Even so, raindrops falling afterward do not blur view that much, securing a safe view even when the wiper operates slowly in heavy rain. In addition, it helps keep the glass clean by eliminating an oil film that could be created while driving.