RainOK Ultimate Glass Clean must be used first. After the surface is dry, RainOk Extreme Rain Repellent can be used.

If there are pollutants on the glass surface, it can cause scratches, so the sand or mud on the glass surface must be washed first with water for the product to be used on a moist surface.

Afterwards, the liquid amount is controlled by rubbing until the liquid is dense, and when the oil film is removed to have the contents spread on the glass surface, they can be wiped off with wet sponge or cloth.

RainOK Ultimate Glass Clean can be used to remove oil film on the glass in the front, rear and side mirrors of the vehicle.

Not all water-repellent coating washers are the same. The glass with poor coating film can rather have more oil film, and it is more difficult to remove the pollutants. 

Bullsone RainOK Water Repellent Coating Washer has outstanding washing ability and water repellency, and shows excellent performance from minimum spray. 

We recommend RainOK Green Washer for commonly all vehicle types. 

In some vehicles (German cars such as Volkswagen/Audi/Benz/BMW, etc.) equipped with conductivity-based washer sensor, warning light can be lighted with the washer when the ethanol 2-in-1 coating washer and the premium water-repellent coating washer are used. 

The sensor detection can be prevented by using purified water and non-conductive ingredient. 

Therefore, we recommend the use of RainOK Green Washer for vehicles equipped with washer sensor. 

Bullsone RainOK washer products use plant extract fermented ethanol instead of methanol, and has acquired EPD (Environmental Product Declaration), proven to be safe for the driver and his/her family.

Just as the shampoo we use daily, it depends on the scalp such as for general use, oily hair and for dyed hair. The washer can also be chosen depending on the needs of the driver.

If you don't like oil film or coating on the glass, we recommend the green washer, and if you want washing, gloss and water-repellent coating at once, please try the 3-in-1 washer. For outstanding water-repellent coating effect, we recommend the ethanol premium water-repellent coating washer.

There are customers who visit the car service center to replace the wiper, or think that replacing the wiper is troublesome and difficult.

But you can actually replace the wiper easily and conveniently through the following methods in order.

First, raise the locking device on the center of the wiper to release.

Second, separate the product from the wiper ring.

Third, release the locking device of the new product.

Fourth, insert the ring to fix the wiper.

Fifth, remove the wiper blade cover to finish the installation.

When the following signs are shown, the wiper needs to be changed.

First, the wiper does not wipe the glass properly, and there is a dragging phenomenon.

Second, friction sound is heard when the wiper is moving, in contact with the glass.

Third, the wiper seems to bounce on operation.

In addition, when there is a oil film on the front glass due to dust and exhaust gas, the above problems cannot be solved just by changing the wiper. In this case, we recommend oil film removal and water-repellent coating before changing the wiper.

The wiper of a vehicle can be compared to the eyes.  

The wiper is an important car component that is connected directly with safety, so regular inspection and management are necessary. 

Especially with the recent serious fine dust, the abrasion of the rubber blade on the wiper, frame distortion and corrosion must be checked for each season. 

If there are abnormal signs such as noise on wiper operation or hydroplaning even before the replacement cycle period, the wiper must be changed immediately.