Before you begin, cut your fingernails and wash your hands. This is to prevent nail damage to the skin and minimum the risk of bringing lint, dust and dirt.

Location to skin application:
There are few locations are suitable for application:
Steamy Bathroom (is a PLUS since steam is capable to trap dust)
Bathroom
Kitchen
Bedroom
Study Room/Guest Room

As long you switch off any air ventilation like fan, air conditioner. Lock your door and windows, your fine to proceed. Clean your area, to minimum the risk of bringing lint and dust.

After cleaning your area, prepare your own solution (if they don't provide you) try look for a shallow dish plate or spray bottle. Put 2 or 3 drops of mild soap and mix it with water, and you now have your own solution.

For mild soap, I suggest using baby shampoo like Johnson baby shampoo or any dish wash liquid.

Once your have your own solution, prepare your own version of squegee card if they don't provide you. Any credit card would be fine but make sure they have straight edges to prevent damage your skin during squegee.

Now you have those two main stuffs, time to bring out your paper towel or microfibre cloth. Personally, I prefer paper towel because it is easily available than microfibre cloth, or anti fog cloth is good to go.

Once you have those stuffs, bring out your skin and read their instructions. Some might give tips for application process.

Time for application, first wash your hands once again and clean them with your paper towel.

Before application, clean your device with your microfibre, anti-fog or paper towel to remove smudges and dust on your screen.  TURN OFF YOUR DEVICE, REMOVE YOUR BATTERY, ENGAGE THE ON SWITCH!

For Spray Bottle method:
Spray your non-adhesive skin for two pumps, then wet your fingers with your spray. Peel your Skin, immediately and give like 3 ~ 4 pumps on adhesive side.

Now place on your device screen, and align it with your fingers. Your skin should move freely for this time. After you have set your alignment, leave your device like 1~2 minutes.

After 1~2 minutes, prepare your credit card or squegee card. Start push your access liquid and air bubbles from middle to the left or middle to the right while try not to move your skin, DO NOT squegee the skin to hard or it will leave marks, or causing miss align.

Keep squeegee for like 5~8 minutes to remove all bubbles and use your paper towel/microfibre cloth to trap any water/liquid to prevent get into the device. After that, clean and damp the screen with paper towel/micro fibre cloth.

Now your skin should be like clean and zero bubbles, if they do have don't peel or being paranoiac. Look for a windy place and place your device there for 12/24 hours. Those streaks, micro-bubbles will dissipated during these period.

AND NOW YOUR SKIN SHOULD BE LOOK CLEAN AND BRAND NEW!