KneeGuardKids3 is thin and narrow, so the car seat does not shake.

However, if you use KneeGuardKids2, some car seat models may cause vibrations or trembling.

In order to resolve this issue, please check the following two points.

1. Make sure that the Installing Plate is correctly positioned as shown below.

If the mounting plate is turned upside down, it will become shaking.

Be sure to separate the top and bottom of the mounting plate as shown below.

<Properly installed Installing Plate>

2. When you use a Junior car seat, using a wooden stick or a 2-liter water bottle behind the car seat as shown below.

Not only will the KneeGuardKids shake off, but the car seat backs will be sloping, making the kids even more comfortable.

At this time, it is better to fill only two-thirds of the water in the water bottle.