A few tips that may help to avoid the dust and bubbles :

1. Power off your device and place it under bright light. So you will be able to see the dust if there is any.

2. Apply the screen protector in clean environment. You may try to install the screen protector in the bathroom after running the shower for a few minutes.

3. You can use sticky tape to remove the dust off the screen. Remember, the most important is there is no dust on the screen before you apply. No dust no bubbles.

In addition, most of the bubbles will go away by themselves after a few days of normal use if there is no dust in the bubbles.

Fintie Clear Premium Screen Protectors provides the purest visibility while still offering scratch resistant protection for your Amazon Fire HD 8 (Previous 6th Gen 2016 / 5th Gen 2015) Tablet. Designed with High Definition displays in mind, you will not compromise image quality. It is a must-have for every Amazon Fire HD 8 (Previous 6th Gen / 5th Gen) Tablet owner

• Specifically designed for Amazon Fire HD 8 (Previous 6th Gen 2016 / 5th Gen 2015) with precise cut-outs for all sensors, perfect fit your Fire HD 8 (6th Gen / 5th Gen) tablet screen.
• Highly Durable: Made from high quality PET material, protects your screen from daily scratches, dust and normal signs of wear.
• High Response / Transparency: Only 0.1mm thickness and 99% transparency make you feel almost nothing on the screen, to preserve original viewing quality and high touch sensitivity.
• Anti-Glare: Anti-reflective and dazzle which can eliminate 98% of the external environment of the reflected light and strong dazzle.
• Package includes: 3 x Fire HD 8 (Both 2015 and 2016 Model) Clear screen protectors, cleaning cloth.

Specifically designed for Amazon Fire HD 8 (Previous 6th Gen 2016 / 5th Gen 2015) with precise cut-outs for all sensors, perfect fit your Fire HD 8 (6th Gen / 5th Gen) tablet screen.Fintie